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    1. Home
    2. /Women
    3. /Clothing
    4. /Underwear & Socks
    5. /Underwear

    Casual Underwear

    Comfortable, well-fitting underwear is the foundation of every outfit, literally. Briefs, thongs, hipsters, boy shorts, seamless styles in cotton, modal, lace, and performance fabrics. We carry options from M&S, ASOS, and specialist brands across a wide range of sizes. Many featured brands offer inclusive sizing and sustainable fabrics. Use our filters to browse by style and fabric, or tell the AI stylist what you need.

    Products

    353 products

    Filter & Sort

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    British Boxers British Boxers Women's 'Fuchsia Pink' Herringbone Brushed Cotton Pyjama Trousers in Magenta
    British Boxers

    British Boxers Magenta Brushed Cotton Pyjama Trousers

    £32.50
    New Look Women's Red Floral Lace Brazilian Briefs New Look
    New Look

    New Look Red Floral Lace Brazilian Briefs

    £3.99
    Marks & Spencer M&S 5pk Cotton Modal Brazilian Knickers Rose Quartz
    Marks & Spencer

    M&S Rose Quartz Cotton Modal Brazilian Knickers Pack

    £12.00
    British Boxers British Boxers Women's 'Whitby Jet' Herringbone Brushed Cotton Pyjama Trousers in Dark Grey
    British Boxers

    British Boxers Dark Grey Brushed Cotton Pyjama Trousers

    £65.00
    New Look Women's Plus Size Tan High Waisted Micro Thong Curves New Look
    New Look

    New Look Tan High Waisted Micro Thong

    £4.79
    Marks & Spencer M&S 3pk Jasmine Lace Thongs Praline
    Marks & Spencer

    M&S Praline Lace Thongs Pack in Praline

    £10.00
    British Boxers British Boxers Women's "Boat Blue" Stripe Crisp Cotton Strappy Nightdress in Light Blue
    British Boxers

    British Boxers Light Blue Stripe Cotton Nightdress

    £89.00
    New Look Women's Plus Size Black Micro High Waisted Brazilian Briefs Curves New Look
    New Look

    New Look Plus Size Black Brazilian Briefs Set

    £4.79
    Marks & Spencer M&S 3pk Leopard Print Lace Trim Full Briefs Chocolate Mix
    Marks & Spencer

    M&S Leopard Print Lace Trim Full Briefs in Chocolate Mix

    £10.00
    British Boxers British Boxers Women's Pack of Four "Fresh Pastels" Bamboo High Leg Knickers
    British Boxers

    British Boxers Multicolor Bamboo High Leg Knickers Pack of Four

    £28.00
    New Look Women's White Floral-Lace Brazilian Briefs New Look
    New Look

    New Look White Floral-Lace Brazilian Briefs

    £5.99
    Marks & Spencer M&S 3pk Cotton Rich Tanga Thongs Lavender Mix
    Marks & Spencer

    M&S Cotton Rich Tanga Thongs in Lavender Mix

    £8.00
    British Boxers British Boxers Women's 'Cahors' Herringbone Brushed Cotton Dressing Gown in Burgundy
    British Boxers

    British Boxers Burgundy Brushed Cotton Dressing Gown

    £125.00
    New Look Women's Floral Lace Thong New Look
    New Look

    New Look White Floral Lace Thong

    £2.99
    Marks & Spencer M&S 5pk Microfibre Low Rise Thongs Rose Quartz
    Marks & Spencer

    M&S Microfibre Low Rise Thongs Rose Quartz

    £12.00
    British Boxers British Boxers Women's Pack of Three "Black" Hipster Briefs in Black
    British Boxers

    British Boxers Women's Pack of Three Black Hipster Briefs

    £28.00
    Marks & Spencer M&S 3pk Lace Trim High Leg Knickers White
    Marks & Spencer

    M&S 3pk Lace Trim High Leg Knickers

    £10.00
    British Boxers British Boxers Women's 'Montrose' Check Brushed Cotton Pyjama Trousers
    British Boxers

    British Boxers Women's 'Montrose' Check Pyjama Trousers

    £65.00
    Marks & Spencer M&S 3 Pack Flexifit™ Modal Rich Period Knickers Black
    Marks & Spencer

    M&S 3 Pack Flexifit™ Modal Rich Period Knickers

    £20.00
    British Boxers British Boxers Women's Pack of Four "Fresh Pastels" Bamboo Hipster Boxer Briefs
    British Boxers

    British Boxers Women's Pack of Four Fresh Pastels Hipster Briefs

    £36.00
    Marks & Spencer M&S 3pk Cotton Rich High Leg Knickers Black
    Marks & Spencer

    M&S Comfortable High Leg Knickers in Black

    £8.00
    British Boxers British Boxers Women's 'Dumbarton' Tartan Brushed Cotton Nightshirt
    British Boxers

    British Boxers Red & Blue Tartan Nightshirt

    £95.00
    Marks & Spencer M&S 5pk Cotton Rich Lycra® High Leg Knickers Black
    Marks & Spencer

    M&S Comfort High Leg Knickers in Black

    £8.00
    British Boxers British Boxers Women's "Coral Shire" Square Brushed Cotton Dressing Gown in Coral
    British Boxers

    British Boxers Coral Shire Dressing Gown in Coral

    £125.00

    Showing 312 of 353

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    Frequently Asked Questions

    What underwear style is most comfortable for daily wear?▾

    Highly personal, but mid-rise hipsters or briefs in cotton or modal are popular for all-day comfort. Seamless styles work best under fitted clothing. The key is finding something that doesn't dig in, ride up, or bunch. Our size guides per brand help get this right first time.

    How often should I replace underwear?▾

    Every 6-12 months depending on wear frequency. Signs: stretched elastic, faded colour, thinning fabric, loss of shape. Having 15-20 pairs in rotation ensures none are overworked. This is one category where new rather than preloved makes sense.

    What underwear works best under tight-fitting clothes?▾

    Seamless, bonded-edge underwear in a nude matching your skin tone. Thongs eliminate visible lines entirely. Laser-cut edges lie flat. Avoid lace edges, thick seams, or decorative details under figure-hugging garments, they show through more than you'd expect.