PrimaLoft®-insulated garment-dyed anti-drop polyester- and nylon-blend twill jacket. · Bungee-style drawstring at detachable hood · Two-way zip closure and button placket · Bellows pockets · Detachable logo patch at sleeve · Adjustable button tab at cuffs · Patch pocket at interior · Full quilted taffeta lining Supplier color: Black Supplier code: 791541249

Stone Island Black David-TC Jacket

RDS-certified down-filled O-Ventile® organic cotton canvas jacket. Windproof, water-repellent, and breathable. · Spread collar · Two-way zip closure with press-stud placket · Zip pockets · Detachable logo patch at sleeve · Rib knit cuffs · Patch pockets and taped seams at interior · Full quilted nylon taffeta lining · Logo-engraved gray hardware Supplier color: Dark grey Supplier code: 7915422F1 Fill: 80% duck down, 20% duck feather.

Stone Island Gray Ghost Down Jacket

Garment-dyed stretch recycled polyester-blend jersey jacket. Water-repellent and wind-resistant. · e.dye® Waterless Color System™ technology · Elasticized trim and bungee-style drawstring at hood · Two-way zip closure · Zip pockets · Rib knit hem and cuffs · Detachable felted logo patch at sleeve · Full bonded mesh lining Supplier color: Dove grey Supplier code: 781540927

Stone Island Gray Garment-Dyed Jacket

Garment-dyed Bio-Alloy™ organic cotton gabardine coat. Water-resistant and wind-resistant. · Detachable hood at spread collar · Concealed button closure · Flap pocket at chest · Welt pockets at waist · Detachable felted logo patch at sleeve · Adjustable press-stud fastening at cuffs · Central vent at back hem · Unlined Supplier color: Black Supplier code: 801571034

Stone Island Black Patch Coat

Garment-dyed cotton canvas jacket. Wind-resistant and water-resistant. · Stand collar · Two-way zip closure · Zip pockets · Velcro tabs at side seams · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Unlined Supplier color: Dark beige Supplier code: 7815431T1

Stone Island Khaki & Gray Hand-Sprayed Jacket

olive green front zip fastening We've partnered with Good On You — an independent agency that rates how brands perform in relation to their impact on the planet, people and animals, with a multi-criteria rating simplified to a five points scale. In order to be awarded our conscious label, larger brands need to score a minimum of four out of five ('Good'), while smaller brands must score at least three out of five ('It's A Start'). This item comes from a brand rated three out of five ('It's A Start') by Good on You at the time it was added on FARFETCH. Please note, this is a brand-level rating and does not guarantee that this product is made with conscious materials. Learn more about what makes a product Conscious on our Conscious Criteria page

Stone Island fleece jacket

blue front press-stud and zip fastening drawstring hood two side zip-fastening pockets drawstring hem

Stone Island Compass-badge puffer jacket

grey stretch-design lightweight construction zip fastening drawstring hood long sleeves logo patch at the sleeve two side welt pockets buttoned cuffs straight hem

Stone Island stretch lightweight jacket

men's nylon jacket: technical fabric panama nylon armor long sleeves fixed hood front closure with double slider zip and buttons front pockets with flap and button side logo patch regular fit composition: 100% polyamide 100% polyurethane resin coating body lining: 60% cotton, 40% polyester sleeve lining: 100% polyamide padding: 100% polyester

Stone Island 44021 Panama Nylon Jacket

navy blue cotton canvas waterproof windproof front two-way zip fastening classic collar long sleeves signature detachable Compass badge ribbed cuffs two front flap pockets internal slip pocket full lining ribbed hem We've partnered with Good On You — an independent agency that rates how brands perform in relation to their impact on the planet, people and animals, with a multi-criteria rating simplified to a five points scale. In order to be awarded our conscious label, larger brands need to score a minimum of four out of five ('Good'), while smaller brands must score at least three out of five ('It's A Start'). This item comes from a brand rated three out of five ('It's A Start') by Good on You at the time it was added on FARFETCH. Please note, this is a brand-level rating and does not guarantee that this product is made with conscious materials. Learn more about what makes a product Conscious on our Conscious Criteria page

Stone Island Ghost jacket

silver-tone moire effect metallic effect padded design duck down-feather filling concealed front zip fastening concealed front press-stud fastening classic hood long sleeves signature detachable Compass badge elasticated cuffs chest flap pocket two front flap pockets internal patch pocket full lining straight hem

Stone Island moire-effect puffer jacket

Stone Island Compass-patch jacket

black We've partnered with Good On You — an independent agency that rates how brands perform in relation to their impact on the planet, people and animals, with a multi-criteria rating simplified to a five points scale. In order to be awarded our conscious label, larger brands need to score a minimum of four out of five ('Good'), while smaller brands must score at least three out of five ('It's A Start'). This item comes from a brand rated three out of five ('It's A Start') by Good on You at the time it was added on FARFETCH. Please note, this is a brand-level rating and does not guarantee that this product is made with conscious materials. Learn more about what makes a product Conscious on our Conscious Criteria page

Stone Island Compass-motif T-shirt

Down jacket realized in polyester enriched by detachable logoed label on the sleeve. -Drawstring hood -Concealed zip closure at the front with visible button -Two zip pockets and two flap pockets at the front -Lined interior with three slit pocketComposition: Exterior: 100% Polyester Lining: 100% Polyester Padding: 90% Down 10% Feathers

Stone Island Midnight Blue Polyester Down Jacket

Lightweight PrimaLoft® Gold P.U.R.E™-insulated polyester twill jacket. PFC-free anti-drop coated. · Bungee-style drawstring at hood and hem · Two-way zip closure · Press-stud placket · Zip pockets · Detachable felted logo patch at sleeve · Inset rib-knit cuffs · Patch pocket at interior · Full satin lining Supplier color: Plaster Supplier code: 811543426

Stone Island Off-White 43426 Micro Twill Jacket

Fabric technology is at the heart of Stone Island's designs. This panelled jacket is made from a lightweight version of its signature ‘David-TC’ – the shell panels are sewn together and then garment-dyed at high temperatures and simultaneously given an anti-drop treatment for a hard-wearing, water-resistant finish.

Stone Island Logo-Appliquéd Panelled Garment-Dyed David Light-TC Hooded Jacket

Primaloft®-insulated and DWR-coated Pertex® Quantum NetPlus® recycled nylon ripstop jacket. Packable, waterproof, wind-resistant, and lightweight. · Stand collar · Two-way zip closure · Zip pockets · Concealed bungee-style drawstring at hem · Detachable felted logo patch at sleeve · Velcro tab at cuffs · Zip pocket at back · Full quilted recycled nylon taffeta lining Supplier color: Black Supplier code: 8115Q0525

Stone Island Black Packable Insulated Jacket

Crinkled ECONYL® regenerated nylon taffeta jacket. · Spread collar · Two-way zip closure · Zip pocket · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Full nylon mesh lining Supplier color: Black Supplier code: 811511819

Stone Island Black Nylon Metal Jacket

RDS-certified down-filled and quilted crinkled nylon taffeta jacket. Wind- and water-resistant, lightweight, garment-dyed, and PFC-free anti-drop-coated. · Funnel neck · Two-way zip closure with button placket · Flap pockets · Concealed bungee-style drawstring at hem · Detachable felted logo patch at sleeve · Inset elasticized cuffs · Patch pocket at interior · Fully lined Supplier color: Black Supplier code: 811540123 Fill: 80% duck down, 20% duck feather.

Stone Island Black Crinkle Reps R-NY Down Jacket

Brushed knit wool- and nylon-blend jacket. · Spread collar · Two-way zip closure with press-stud placket · Patch pockets at waist · Rib-knit cuffs · Embroidered logo patch at sleeve · Contrast stitching in black Supplier color: Royal Blue Supplier code: 811546130

Stone Island Blue Wool Coach Jacket

ECONYL® regenerated nylon taffeta jacket. Webbing trim throughout. · Stand collar · Zip closure · Welt pockets · Storm flap at front and back · Elasticized hem and cuffs · Raglan sleeves · Detachable felted logo patch at sleeve · Full mesh lining Supplier color: Natural beige Supplier code: 8015661E1

Stone Island Beige Patch Jacket

Garment-dyed PFC-free anti-drop coated linen canvas jacket. · Detachable hood · Stand collar · Two-way zip closure with press-stud placket · Welt pockets · Concealed drawstring at hem · Saddle shoulders · Adjustable press-stud tab at cuffs · Eyelets vents at back collar · Logo printed at back · Logo-engraved silver-tone hardware Supplier color: Pink Supplier code: 8015418X1

Stone Island Pink Detachable Hood Jacket

RDS-certified down-filled and quilted stretch nylon taffeta jacket. Lightweight, garment-dyed, and PFC-free anti-drop-coated. · Webbing trim throughout · Hood at funnel neck · Two-way zip closure · Zip pockets · Elasticized hem and cuffs · Detachable logo patch at sleeve · Patch pockets at interior · Fully lined Supplier color: Musk Supplier code: 811543128 Fill: 90% duck down, 10% duck feather.

Stone Island Khaki 43128 Seamless Tunnel Nylon Down Jacket

RDS-certified down-filled and quilted crinkled ECONYL® regenerated nylon taffeta jacket. Garment-dyed and PFC-free anti-drop coated. · Bungee-style drawstring at hood and hem · Funnel neck · Two-way zip closure with press-stud placket · Zip pockets · Concealed drawstring at hem · Webbing trim at side seams · Detachable felted logo patch at sleeve · Elasticized cuffs · Patch pocket at interior · Full nylon taffeta lining Supplier color: Musk Supplier code: 811541419 Fill: 80% duck down, 20% duck feather.

Stone Island Khaki 41419 Nylon Metal ECONYL Down Jacket

Cotton ripstop jacket. · Spread collar · Button closure · Patch pockets · Webbing trim at chest · Detachable felted logo patch at sleeve · Single-button barrel cuffs · Unlined Supplier color: Grey green Supplier code: 811511412

Stone Island Gray Logo Patch Jacket

RDS-certified down-filled and quilted crinkled nylon taffeta jacket. Lightweight, garment-dyed, and PFC-free anti-drop-coated. · Bungee-style drawstring at hood · Two-way zip closure · Zip pockets · Detachable felted logo patch at sleeve · Elasticized cuffs · Fully lined Supplier color: Grey Supplier code: 811540324 Fill: 90% duck down, 10% duck feather.

Stone Island Gray 40324 Loom Woven Chambers Down Jacket

Primaloft®-insulated recycled nylon taffeta jacket. Water- and wind-resistant. · Garment-dyed and PFC-free anti-drop coating · Bungee-style drawstring at hood · Stand collar · Two-way zip closure · Zip pockets · Rib knit hem and cuffs · Detachable felted logo patch at sleeve · Full quilted satin lining Supplier color: Lead grey Supplier code: 811540823

Stone Island Gray 40823 Crinkle Reps R-NY Jacket

Garment-dyed polyurethane-coated polyester mesh jacket. Wind-resistant. · Layered construction · Stand collar · Concealed press-stud closure · Zip closure · Welt pockets · Detachable felted logo patch at sleeve · Velcro tab at cuffs · Storm flap at back · Detachable quilted nylon satin vest-style underlay Supplier color: Musk Supplier code: 811545831

Stone Island Green 45831 Glass Cover-TC Jacket

Lightweight RDS-certified down-filled recycled nylon taffeta jacket. PFC-free water-repellent coating and garment-dyed. · Bungee-style drawstring at brimmed hood · Stand collar · Two-way zip closure · Elasticized trim at hem and cuffs · Zip seam pockets · Detachable felted logo patch at sleeve · Patch pockets at interior · Fully lined Supplier color: Navy blue Supplier code: 801540124 Fill 1: 90% duck down, 10% duck feather.

Stone Island Navy Patch Down Jacket

Garment-dyed stretch cotton satin jacket. · Spread collar · Two-way zip closure · Flap pockets · Vented side seams · Detachable felted logo patch at sleeve · Press-stud fastening at partially elasticized cuffs · Darts at back Supplier color: Black Supplier code: 811512808

Stone Island Black Regular Fit Jacket

Down-filled and quilted crinkled stretch nylon-blend taffeta jacket. · Rib-knit stand collar, hem, and cuffs · Two-way zip closure · Zip pockets · Detachable felted logo patch at sleeve · Fully lined Supplier color: Musk Supplier code: 811540228 Fill: 90% duck down, 10% duck feather.

Stone Island Green Quilted Down Jacket

RDS-certified down-filled quilted crinkled nylon taffeta jacket. Lightweight, garment-dyed, and PFC-free anti-drop-coated. · Bungee-style drawstring at hood · Two-way zip closure · Zip pockets · Detachable felted logo patch at sleeve · Elasticized cuffs · Fully lined Supplier color: Walnut Supplier code: 811542924 Fill: 90% duck down, 10% duck feather.

Stone Island Brown 42924 Loom Woven Chambers Down Jacket

Water-repellent polyester micro twill jacket. · Stowaway hood at stand collar · Two-way zip closure with press-stud placket · Flap and zip pockets · Concealed bungee-style drawstring at hem · Vent at underarms · Detachable felted logo patch at sleeve · Rib knit cuffs · Unlined · Logo-engraved black hardware Supplier color: Musk Supplier code: 801541626

Stone Island Green Stand Collar Jacket

PrimaLoft®-insulated 3-ply 8000mm stretch polyester canvas jacket. e.dye® Waterless Color System™-dyed and PFC-free anti-drop coated. · Breathable, windproof, and waterproof · Stowaway hood at stand collar · Two-way zip closure · Flap pocket · Zip pocket · Elasticized hem · Detachable felted logo patch at sleeve · Rib-knit cuffs · Patch pocket at interior · Full satin lining Supplier color: Grey Supplier code: 811540527

Stone Island Gray 40527 Soft Shell-R PrimaLoft Insulated Jacket

RDS-certified down-filled quilted nylon ripstop puffer jacket. Water-resistant and wind-resistant. · Stand collar · Two-way zip closure with press-stud placket · Logo printed at front and back · Welt pockets · Elasticized hem and cuffs · Adjustable press-stud fastening at side seams · Patch pocket at interior · Full taffeta lining · Logo-engraved silver-tone hardware Supplier color: Ink Supplier code: 8115446X1 Fill: 80% duck down, 20% duck feather.

Stone Island Navy 'Marina' Down Puffer Jacket

Primaloft®-insulated polyester twill coat. Lightweight and water-resistant. · Spread collar · Concealed button closure · Welt pockets · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Press-stud vent at back hem · Patch pocket at interior · Full quilted taffeta lining Supplier color: Navy blue Supplier code: 811570626

Stone Island Navy Insulated Coat

PFC-free garment-dyed PrimaLoft®-TC-insulated nylon ripstop jacket. Packable, lightweight, wind-resistant. · Brimmed elasticized hood · Two-way zip closure · Zip pockets · Bungee-style drawstring at hem · Detachable felted logo patch at sleeve · Rib knit cuffs · Zip pocket at interior Supplier color: Black Supplier code: 7915Q0325

Stone Island Black Packable Jacket

Garment-dyed polyurethane-coated nylon taffeta jacket. · Concealed bungee-style drawstring at brimmed hood · Two-way zip closure · Zip pockets · Concealed bungee-style drawstring at hem · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Full mesh lining Supplier color: Navy blue Supplier code: 781540522

Stone Island Navy Garment-Dyed Jacket

Down-filled and quilted crinkled nylon taffeta jacket. Graphic pattern printed throughout. · PFC-free anti-drop coating · Press-stud throat guard at detachable hood · Stand collar · Two-way zip closure · Concealed press-stud placket · Welt pockets · Press-stud tab at elasticized cuffs · Patch pocket at interior · Fully lined Supplier color: Dove grey Supplier code: 8115462E1 Fill: 80% duck down, 20% duck feather.

Stone Island Beige Fire Ice Down Jacket

Lightweight garment-dyed stretch recycled polyester canvas jacket. Breathable, water-resistant, and wind-resistant. · Bungee-style drawstring at stowaway hood · Stand collar · Two-way zip closure · Zip pockets · Concealed bungee-style drawstring at hem · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Full fleece lining Supplier color: Black Supplier code: 8115Q0222

Stone Island Black Soft Shell Jacket

Lightweight padded quilted and garment-dyed anti-drop cotton-blend taffeta jacket. · Spread collar · Two-way zip closure with press-stud placket · Flap pocket at seam pockets · Detachable felted logo patch at sleeve · Single-press-stud barrel cuffs · Fully lined · Logo-engraved black hardware Supplier color: Musk Supplier code: 8115Q0633

Stone Island Khaki Quilted Jacket

Garment-dyed cotton- and lyocell-blend canvas jacket. Fading throughout. · Button tab at spread collar · Two-way zip closure · Zip pockets and welt pockets · Elasticized hem and cuffs · Detachable felted logo patch at sleeve Supplier color: Pistachio Supplier code: 8015431T1

Stone Island Green Patch Jacket

Garment-dyed PrimaLoft®-TC insulated crinkled recycled nylon taffeta bomber jacket. Wind-resistant and water-resistant. · Rib knit stand collar, hem, and cuffs · Two-way zip closure with press-stud placket · Flap pockets · Detachable felted logo patch at sleeve · Patch pocket at interior · Fully lined · Logo-engraved black hardware Supplier color: Black Supplier code: 811540923

Stone Island Black Wind-Resistant Bomber Jacket

Paneled polyester taffeta and polyester-blend moleskin jacket. · Bungee-style drawstring at hood and hem · Stand collar · Two-way zip closure · Button closure · Welt pockets · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Logo-engraved silver-tone hardware Supplier color: Black Supplier code: 801542732

Stone Island Black Hooded Jacket

PrimaLoft® Gold P.U.R.E™-insulated and quilted Pertex® Quantum NetPlus® recycled nylon ripstop jacket. Lightweight, wind-resistant, and PFC-free anti-drop-coated. · Bungee-style drawstring at hood · Two-way zip closure · Zip pockets · Elasticized hem and cuffs · Raglan sleeves · Detachable felted logo patch at sleeve · Patch pockets at interior · Fully lined Supplier color: Black Supplier code: 811543232

Stone Island Black 43232 Pertex Quantum PrimaLoft Insulated Jacket

RDS-certified down-filled and quilted virgin wool twill puffer jacket. · Stand collar · Two-way zip closure · Welt pockets · Bungee-style drawstring at hem · Detachable felted logo patch at sleeve · Inset rib knit cuffs · Full nylon taffeta lining Supplier color: Black Supplier code: 8115453F3 Fill: 80% duck down, 20% duck feather.

Stone Island Black Logo Patch Down Jacket

Garment-dyed linen- and nylon-blend canvas jacket. · Press-stud tab at funnel neck · Two-way zip closure · Welt pockets · Detachable felted logo patch at sleeve · Adjustable single-press-stud barrel cuffs · Vents at back yoke · Adjustable press-stud tabs at back hem · Partial nylon mesh lining Supplier color: Natural beige Supplier code: 801542130

RDS-certified down-filled and quilted recycled nylon taffeta vest. Garment-dyed and PFC-free anti-drop-coated. · Stand collar · Two-way zip closure · Zip pockets · Detachable felted logo patch at side seam · Saddle shoulders · Fully lined Supplier color: Grey Supplier code: 8115G0724 Fill: 90% duck down, 10% duck feathers.

Stone Island Gray Quilted Down Vest

Lightweight PrimaLoft® Gold P.U.R.E™-insulated polyester twill jacket. PFC-free anti-drop coated. · Stowaway hood at stand collar · Two-way zip closure · Press-stud placket · Flap pockets · Welt pockets · Detachable felted logo patch at sleeve · Press-stud tab at cuffs · Bungee-style drawstring at inner waist · Patch pocket at interior · Full satin lining Supplier color: Charcoal Supplier code: 811543626

Stone Island Gray 43626 Micro Twill Jacket

Garment-dyed PFC-free water-repellent coated recycled polyester taffeta jacket. · Spread collar · Zip closure with button placket · Moleskin patch pockets · Ruching at side seams · Seam pockets · Felted logo patch at sleeve · Rib knit cuffs · Logo-engraved silver-tone hardware Supplier color: White Supplier code: 801542932

Stone Island White Garment-Dyed Jacket

RDS-certified down-filled polyester-blend twill jacket. Lightweight, garment-dyed, and PFC-free anti-drop-coated. · Bungee-style drawstring at hood · Logo-embroidered rolled brim at hood · Stand collar · Two-way zip closure · Flap pockets · Bungee-style drawstring at hem · Raglan sleeves · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Full quilted satin lining Supplier color: Black Supplier code: 811541649 Fill: 80% duck down, 20% duck feather.

Stone Island Black 41649 David-TC Down Jacket

Lightweight stretch recycled polyester canvas jacket. Breathable, water-resistant, and wind-resistant. · Elasticized trim and bungee-style drawstring at hood · Stand collar · Two-way zip closure · Zip pockets · Rib knit hem and cuffs · Detachable felted logo patch at sleeve · Full fleece lining Supplier color: Black Supplier code: 8115Q0322

Down-filled PFC-free anti-drop polyester micro twill jacket. · Bungee-style drawstring at detachable hood · Funnel neck · Two-way zip closure with press-stud placket · Zip and bellows pockets · Detachable felted logo patch at sleeve · Inset rib knit cuffs · Patch pocket at interior · Full quilted taffeta lining · Logo-engraved black hardware Supplier color: Charcoal Supplier code: 811570726 Fill: 80% duck down, 20% duck feather.

Stone Island Gray Hooded Down Jacket

Primaloft®-insulated, resin-coated, and garment-dyed recycled nylon taffeta jacket. · Spread collar · Two-way zip closure · Flap pocket at chest · Shirttail hem · Detachable felted logo patch at sleeve · Full quilted recycled nylon taffeta lining Supplier color: Black Supplier code: 8115Q0123

Stone Island Black Garment-Dyed Insulated Jacket

Crinkled garment-dyed coated nylon taffeta jacket. Wind- and water-resistant. · Bungee-style drawstring at hood · Press-stud tab at hood for rolled stowaway-styling · Two-way zip closure · Faux-storm flaps at chest · Bungee-style drawstring at hem · Zip seam pockets · Detachable logo patch at sleeve · Elasticized cuffs · Full mesh lining Supplier color: Pink Supplier code: 801540922

Stone Island Pink Crinkle Reps R-NY Jacket

Primaloft®-insulated O-Ventile® organic cotton canvas coat. Windproof, water-repellent, and breathable. · Spread collar · Two-way zip closure with press-stud placket · Flap pockets · Raglan sleeves · Detachable logo patch at sleeve · Adjustable press-stud tab at cuffs · Patch pockets and tape seams at interior · Full quilted nylon taffeta lining · Logo-engraved navy hardware Supplier color: Navy blue Supplier code: 7915710F1

Stone Island Navy Ghost Coat

PrimaLoft® insulated cotton canvas jacket. Water-repellant and windproof. · Bungee-style drawstring at hood and hem · Funnel neck · Two-way zip closure · Flap pockets · Detachable felted logo patch at sleeve · Press-stud fastening at cuffs · Full quilted nylon taffeta lining Supplier color: Black Supplier code: 8115419F1

Crinkled garment-dyed Membrana 3L-TC nylon taffeta bomber jacket. Breathable, water-resistant, and wind-resistant. · Rib knit stand collar, hem, and cuffs · Two-way zip closure · Flap pockets · Detachable logo patch at sleeve · Bonded brushed plain-woven lining Supplier color: Black Supplier code: 801541223

Stone Island Black Crinkled Bomber Jacket

Breathable 3-ply 8000mm stretch polyester canvas jacket. e.dye® Waterless Color System™ technology and PFC-free water- and wind-proof coating. · Concealed bungee-style drawstring at hood · Stand collar · Two-way zip closure with press-stud placket · Flap pockets · Rib knit hem and cuffs · Detachable felted logo patch at sleeve · Full jersey lining Supplier color: Musk Supplier code: 801540227

Stone Island Khaki Patch Jacket

Material: 70% polyester, 30% polyamide. Care instructions: machine wash at 30 degrees. Made in Romania. Designer color name: Olive. Material II: 70% polyester, 30% polyamide. Lining: 100% polyester. Filling: 100% polyester. Fully lined. Closure: two-way zipped front, buttoned front. Pockets: slant pockets, internal pocket. Length: long (thigh-length). Utility jacket. Jacket construction: soft structured.

Stone IslandDavid-TC Compass parka

Product Info

Stone Island David-TC Compass parka