• Women
    • New Arrivals Arrow pointing right
    • CashmereArrow pointing right
    • Coats & JacketsArrow pointing right
    • ClothingArrow pointing right
      • CashmereArrow pointing right
      • KnitwearArrow pointing right
      • Merino Wool | NEWArrow pointing right
      • Trousers Arrow pointing right
      • Coats & Jackets | UPDATEDArrow pointing right
      • Wool Coats | NEWArrow pointing right
      • TopsArrow pointing right
      • Shirts & BlousesArrow pointing right
      • DressesArrow pointing right
      • T-ShirtsArrow pointing right
      • JeansArrow pointing right
      • Suits & TailoringArrow pointing right
      • SkirtsArrow pointing right
      • Co-ord SetsArrow pointing right
      • All WomenswearArrow pointing right
      • Woman in a dark sweater, white shirt, red pullover tied at waist, wide black pants, and beret, leaning against a wall with crossed arms.
        Placeholder for: Woman in a dark sweater, white shirt, red pullover tied at waist, wide black pants, and beret, leaning against a wall with crossed arms.
        TrousersArrow pointing right
    • AccessoriesArrow pointing right
      • All AccessoriesArrow pointing right
      • New AccessoriesArrow pointing right
      • Hats, Scarves & GlovesArrow pointing right
      • BagsArrow pointing right
      • ShoesArrow pointing right
      • JewelleryArrow pointing right
      • BeltsArrow pointing right
      • Socks & TightsArrow pointing right
      • Close-up of a person's face with their chin resting on a hand wearing shiny red gloves, against a neutral background.
        Placeholder for: Close-up of a person's face with their chin resting on a hand wearing shiny red gloves, against a neutral background.
        Scarves, Hats & GlovesArrow pointing right
    • BagsArrow pointing right
      • All BagsArrow pointing right
      • Tote BagsArrow pointing right
      • Crossbody BagsArrow pointing right
      • Clutch BagsArrow pointing right
      • Black leather handbag with a smooth texture and a curved top handle, displayed against a plain background.
        Placeholder for: Black leather handbag with a smooth texture and a curved top handle, displayed against a plain background.
        Tote BagsArrow pointing right
    • ShoesArrow pointing right
      • All ShoesArrow pointing right
      • BootsArrow pointing right
      • LoafersArrow pointing right
      • Ballet FlatsArrow pointing right
      • FlatsArrow pointing right
      • HeelsArrow pointing right
      • A sleek black leather ankle boot with a pointed toe and a low heel, displayed against a white background.
        Placeholder for: A sleek black leather ankle boot with a pointed toe and a low heel, displayed against a white background.
        BootsArrow pointing right
    • Trend EditionsArrow pointing right
      • Autumn Winter 2026 RunwayArrow pointing right
      • Leopard Print | NEWArrow pointing right
      • Vivid Purple TonesArrow pointing right
      • The Leather EditArrow pointing right
      • Occasion EditArrow pointing right
      • A woman with long brown hair wearing a purple turtleneck and black wide-leg pants stands indoors against a neutral background.
        Placeholder for: A woman with long brown hair wearing a purple turtleneck and black wide-leg pants stands indoors against a neutral background.
        Person wearing a purple top, black pants, and large sunglasses, standing against a beige textured wall.
        Placeholder for: Person wearing a purple top, black pants, and large sunglasses, standing against a beige textured wall.
        A person with long curly hair wearing a green jacket, purple turtleneck, and large sunglasses stands confidently with arms crossed.
        Placeholder for: A person with long curly hair wearing a green jacket, purple turtleneck, and large sunglasses stands confidently with arms crossed.
        Vivid Purple TonesArrow pointing right
        A person with long wavy hair wearing a black beret, a loose dark patterned blouse, and black trousers stands against a neutral background.
        Placeholder for: A person with long wavy hair wearing a black beret, a loose dark patterned blouse, and black trousers stands against a neutral background.
        A model wearing a leopard-print coat and black striped tights stands in a room with a fireplace.
        Placeholder for: A model wearing a leopard-print coat and black striped tights stands in a room with a fireplace.
        Person in a patterned, flowing outfit with a scarf, sitting on a dark leather couch, posing with a hand resting by the face.
        Placeholder for: Person in a patterned, flowing outfit with a scarf, sitting on a dark leather couch, posing with a hand resting by the face.
        Leopard PrintArrow pointing right
        Person in a gray blazer holding a large black leather clutch, with long wavy hair and neutral expression against a blurred background.
        Placeholder for: Person in a gray blazer holding a large black leather clutch, with long wavy hair and neutral expression against a blurred background.
        Model wearing a long, dark navy overcoat with a matching turtleneck, walking on a minimalist runway with neutral-colored panels.
        Placeholder for: Model wearing a long, dark navy overcoat with a matching turtleneck, walking on a minimalist runway with neutral-colored panels.
        A model wearing an oversized black blazer and sheer turtleneck walks on a runway.
        Placeholder for: A model wearing an oversized black blazer and sheer turtleneck walks on a runway.
        Autumn Winter 2026 RunwayArrow pointing right
    • Perfume & CandlesArrow pointing right
      • Perfume & Candles | NEWArrow pointing right
      • An arrangement of various perfume bottles in different colors, with visible labels.
        Placeholder for: An arrangement of various perfume bottles in different colors, with visible labels.
        Perfume & CandlesArrow pointing right
    • My AccountArrow pointing right
    • DeliveryArrow pointing right
    • ReturnsArrow pointing right
    • Contact UsArrow pointing right
    • Gift CardArrow pointing right
    • Black and white portrait of a person with long hair wearing a dark turtleneck sweater and a black hat, leaning back with an arm bent.
      Placeholder for: Black and white portrait of a person with long hair wearing a dark turtleneck sweater and a black hat, leaning back with an arm bent.
      CASHMEREArrow pointing right
    • Person with long hair wearing a black coat and holding a small red handbag, standing in a softly lit room.
      Placeholder for: Person with long hair wearing a black coat and holding a small red handbag, standing in a softly lit room.
      All WomenswearArrow pointing right
  • Men
    • New Arrivals Arrow pointing right
    • ALL MENSWEARArrow pointing right
    • KnitwearArrow pointing right
    • ClothingArrow pointing right
      • T-shirts & Tank TopsArrow pointing right
      • Henley TopsArrow pointing right
      • Trousers & ShortsArrow pointing right
      • Wide-leg TrousersArrow pointing right
      • Coats & JacketsArrow pointing right
      • CashmereArrow pointing right
      • JumpersArrow pointing right
      • CardigansArrow pointing right
      • KnitwearArrow pointing right
      • Jeans & DenimArrow pointing right
      • ShirtsArrow pointing right
      • Sweatshirts & HoodiesArrow pointing right
      • Polo ShirtsArrow pointing right
      • SuitsArrow pointing right
      • Co-ord SetsArrow pointing right
      • All MenswearArrow pointing right
      • A person with curly hair wearing a dark jacket and shirt looks to the side, adjusting their collar.
        Placeholder for: A person with curly hair wearing a dark jacket and shirt looks to the side, adjusting their collar.
        Coats & JacketsArrow pointing right
    • BagsArrow pointing right
      • All Bags & WalletsArrow pointing right
      • A crumpled black leather bag with prominent zippers and straps, showcasing a glossy texture against a light background.
        Placeholder for: A crumpled black leather bag with prominent zippers and straps, showcasing a glossy texture against a light background.
        BagsArrow pointing right
    • ShoesArrow pointing right
      • All ShoesArrow pointing right
      • LoafersArrow pointing right
      • BootsArrow pointing right
      • Close-up of a sleek black leather Chelsea boot with elastic side panel, set against a plain background.
        Placeholder for: Close-up of a sleek black leather Chelsea boot with elastic side panel, set against a plain background.
        ShoesArrow pointing right
    • AccessoriesArrow pointing right
      • All AccessoriesArrow pointing right
      • JewelleryArrow pointing right
      • Hats & Scarves Arrow pointing right
      • BeltsArrow pointing right
      • SocksArrow pointing right
      • ShoesArrow pointing right
      • BagsArrow pointing right
      • A black leather belt with a large rectangular buckle, shot in high contrast black and white.
        Placeholder for: A black leather belt with a large rectangular buckle, shot in high contrast black and white.
        All AccessoriesArrow pointing right
      • Autumn Winter 2026 RunwayArrow pointing right
      • Modern Utility | NEWArrow pointing right
      • A person wearing a light blue shirt with rolled-up sleeves, light blue tie, and dark pants stands against a neutral background.
        Placeholder for: A person wearing a light blue shirt with rolled-up sleeves, light blue tie, and dark pants stands against a neutral background.
        A person wearing a blue matching jacket and trousers, holding a black backpack over one shoulder, standing against a plain background.
        Placeholder for: A person wearing a blue matching jacket and trousers, holding a black backpack over one shoulder, standing against a plain background.
        A man in a dark navy suit with a black turtleneck stands with his hands in his pockets against a light gray background.
        Placeholder for: A man in a dark navy suit with a black turtleneck stands with his hands in his pockets against a light gray background.
        Modern UtilityArrow pointing right
        A person wearing a dark, oversized coat and a matching formal shirt and tie walks the runway in a modern, well-lit setting.
        Placeholder for: A person wearing a dark, oversized coat and a matching formal shirt and tie walks the runway in a modern, well-lit setting.
        Model in a long, dark trench coat with high collar and belt, walking indoors with a neutral expression. Beige panel background.
        Placeholder for: Model in a long, dark trench coat with high collar and belt, walking indoors with a neutral expression. Beige panel background.
        A person wearing a black hooded jacket with a leather exterior, standing indoors.
        Placeholder for: A person wearing a black hooded jacket with a leather exterior, standing indoors.
        Autumn Winter 2026 RunwayArrow pointing right
    • Perfume & CandlesArrow pointing right
      • Perfume & Candles | NEWArrow pointing right
      • An arrangement of various perfume bottles in different colors, with visible labels.
        Placeholder for: An arrangement of various perfume bottles in different colors, with visible labels.
        Perfume & CandlesArrow pointing right
    • My AccountArrow pointing right
    • DeliveryArrow pointing right
    • ReturnsArrow pointing right
    • Contact UsArrow pointing right
    • Gift CardArrow pointing right
    • Person wearing a grey textured sweater with a scarf tied around the neck, looking to the side, standing in a well-lit room.
      Placeholder for: Person wearing a grey textured sweater with a scarf tied around the neck, looking to the side, standing in a well-lit room.
      KNITWEARArrow pointing right
    • A man wearing a dark brown jacket and trousers, holding a folded coat, stands against a light wall with one hand in his pocket.
      Placeholder for: A man wearing a dark brown jacket and trousers, holding a folded coat, stands against a light wall with one hand in his pocket.
      TrousersArrow pointing right
Women/Trousers/Balloon Trousers

Balloon Trousers

Person wearing an oversized black suit with a light blue dress shirt, standing confidently against a plain background.

All Trousers

A person stands wearing a beige turtleneck sweater, grey wide-leg trousers, and holding a black leather bag.

Wide-leg

Person wearing a black shirt, wide-leg pants, and a silver necklace, standing against a plain white background.

Barrel-Leg

Model in a grey button-up sweater and black wide-leg trousers, holding a small black handbag, against a plain background.

Straight-Leg

A woman stands against a plain white background, wearing a white button-up shirt and black wide-leg trousers, with hands in pockets.

Black

A person in a black button-up outfit holds a brown bag, standing against a plain white background.

Wool

A person wearing a dark brown shirt with a wide collar, black pants, and black heels, holding a black purse, stands against a plain white background.

Balloon

A person wearing beige silk outfit and sunglasses, holding a black leather bag, stands against a white background.

White

Person wearing a denim jacket and jeans with a white shirt, standing against a plain background.

Jeans

Person wearing an oversized black suit with a light blue dress shirt, standing confidently against a plain background.

All Trousers

A person stands wearing a beige turtleneck sweater, grey wide-leg trousers, and holding a black leather bag.

Wide-leg

Person wearing a black shirt, wide-leg pants, and a silver necklace, standing against a plain white background.

Barrel-Leg

Model in a grey button-up sweater and black wide-leg trousers, holding a small black handbag, against a plain background.

Straight-Leg

A woman stands against a plain white background, wearing a white button-up shirt and black wide-leg trousers, with hands in pockets.

Black

A person in a black button-up outfit holds a brown bag, standing against a plain white background.

Wool

A person wearing a dark brown shirt with a wide collar, black pants, and black heels, holding a black purse, stands against a plain white background.

Balloon

A person wearing beige silk outfit and sunglasses, holding a black leather bag, stands against a white background.

White

Person wearing a denim jacket and jeans with a white shirt, standing against a plain background.

Jeans

Arrow pointing right
Cotton barrel-leg joggers

Cotton barrel-leg joggers

85 CHF

Arrow pointing right
New
Pleated balloon trousers

Pleated balloon trousers

180 CHF

Arrow pointing right
New
Cotton barrel-leg joggers

Cotton barrel-leg joggers

85 CHF

Arrow pointing right
Pleated cotton-blend balloon trousers

Pleated cotton-blend balloon trousers

145 CHF

Arrow pointing right
Tailored cotton barrel-leg trousers

Tailored cotton barrel-leg trousers

130 CHF

Arrow pointing right
Buckle-detail linen barrel-leg trousers

Buckle-detail linen barrel-leg trousers

145 CHF

Arrow pointing right
Tailored linen barrel-leg trousers

Tailored linen barrel-leg trousers

145 CHF

Arrow pointing right
Buckle-detail linen barrel-leg trousers

Buckle-detail linen barrel-leg trousers

145 CHF

Arrow pointing right
Gathered jersey balloon trousers

Gathered jersey balloon trousers

99 CHF

Arrow pointing right
Pleated wool-blend balloon-leg trousers

Pleated wool-blend balloon-leg trousers

180 CHF

Arrow pointing right
Jersey tulip trousers

Jersey tulip trousers

115 CHF

Arrow pointing right
Pleated crepe balloon trousers

Pleated crepe balloon trousers

180 CHF

Arrow pointing right
Tailored cotton barrel-leg trousers

Tailored cotton barrel-leg trousers

130 CHF

Arrow pointing right
Pleated crepe balloon trousers

Pleated crepe balloon trousers

180 CHF

Arrow pointing right
Pleated twill balloon trousers

Pleated twill balloon trousers

145 CHF

Explore more

  • Tops
  • Dresses
  • Trousers fit guide
  • New Arrivals

    The COS balloon trouser brings an unexpected vision to the modern wardrobe. The women's balloon trouser collection is realised through architectural silhouettes and superior fabrics, from cotton balloon pants destined for the city to linen balloon pants that come into focus in summer. Discover a palette of enduring neutrals and tonal hues in the balloon-leg trouser edit.

    The COS balloon trouser brings an unexpected vision to the modern wardrobe. The women's balloon trouser collection is realised through architectural silhouettes and superior fabrics, from cotton balloon pants destined for the city to linen balloon pants that come into focus in summer. Discover a palette of enduring neutrals and tonal hues in the balloon-leg trouser edit.


    THE COS NEWSLETTER

    Sign up to receive 10% off your first order and stay up to date on new collections, events and exclusive offers.

    SIGN UP

    THE COMPANY

    • ABOUT
    • CAREERS
    • PRESS
    • STORE LOCATOR
    • DESIGN & CRAFT
    • FEATURES
    • FACEBOOK
    • INSTAGRAM
    • PINTEREST
    • TIKTOK
    • SPOTIFY

    ASSISTANCE

    • CONTACT US
    • DELIVERY INFORMATION
    • RETURN & REFUNDS
    • RIGHT OF WITHDRAWAL
    • GIFT CARD
    • PAYMENTS
    • FAQ
    • PRODUCT CARE
    • SIZE GUIDE
    • FIT GUIDE
    • STUDENT DISCOUNT

    LEGAL

    • TERMS & CONDITIONS
    • PRIVACY POLICY
    • YOUR GUARANTEE RIGHTS
    • MEMBER T&Cs
    • COOKIE NOTICE
    • ACCESSIBILITY
    • IMPRINT