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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

    482 products

    Filter & Sort

    -
    New Look Women's Yellow Floral Print Lace Thong New Look
    New Look

    New Look Yellow Floral Lace Thong

    £7.19
    British Boxers British Boxers Women's "Field Green" Gingham Crisp Cotton Pyjama Set in Light Green
    British Boxers

    British Boxers Light Green Gingham Pyjama Set

    £115.00
    Yours 5 Pack Plus Size Blue Animal Star Full Briefs
    Yours

    Yours Plus Size Blue Animal Star Full Briefs 5-Pack

    £14.99
    Marks & Spencer M&S 7 Pack Microfibre High Leg Knickers White Mix
    Marks & Spencer

    M&S 7 Pack Microfibre High Leg Knickers White Mix

    £16.00
    New Look Women's Tan Bonded High Waist Micro Thong New Look
    New Look

    New Look Tan Bonded Micro Thong

    £6.39
    British Boxers British Boxers Women's "Boat Blue" Stripe Crisp Cotton Short Pyjama Set in Light Blue
    British Boxers

    British Boxers Light Blue Stripe Cotton Short Pyjama Set

    £105.00
    Yours 5 Pack Plus Size Black & Khaki Green Animal Print Full Briefs
    Yours

    Yours Plus Size Black & Khaki Green Animal Print Full Briefs 5

    £14.99
    Marks & Spencer M&S 3pk Seamless Over Bump Maternity Briefs Wine Mix
    Marks & Spencer

    M&S 3pk Seamless Over Bump Maternity Briefs Wine Mix

    £18.00
    New Look Women's Black Ribbed Seamless High Leg Thong New Look
    New Look

    New Look Black Ribbed Seamless High Leg Thong

    £7.99
    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
    Yours 5 Pack Plus Size Blue & Pink Floral Full Briefs
    Yours

    Yours Plus Size Blue & Pink Floral Full Briefs 5 Pack

    £14.99
    Marks & Spencer M&S 7 Pack Cotton Rich Lace Waist Full Briefs Light Cream
    Marks & Spencer

    M&S 7 Pack Cotton Rich Lace Waist Full Briefs Light Cream

    £16.00
    New Look Women's Plus Size White Ribbed Seamless High Waisted Thong Curves New Look
    New Look

    New Look White Ribbed Seamless High Waisted Thong

    £7.99
    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
    Yours Grey Seamless Light Control High Waisted Full Briefs
    Yours

    Yours Grey Seamless Light Control High Waisted Full Briefs

    £12.00
    Marks & Spencer M&S 5pk Cotton Lycra® & Lace Full Briefs Dusky Pink
    Marks & Spencer

    M&S 5pk Cotton Lycra® & Lace Full Briefs Dusky Pink

    £12.00
    New Look Women's Red Floral Lace Thong New Look
    New Look

    New Look Red Floral Lace Thong

    £1.00
    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
    Yours Plus Size Natural Brown Leopard Print Satin Briefs
    Yours

    Yours Plus Size Brown Leopard Print Satin Briefs

    £8.99
    Marks & Spencer M&S 3 Pack Jasmine All Over Lace Hipster Knickers Dark Wine
    Marks & Spencer

    M&S Dark Wine Lace Hipster Knickers 3 Pack

    £10.00
    New Look Women's Light Blue Ruched Back Thong New Look
    New Look

    New Look Light Blue Ruched Back Thong

    £2.00
    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
    Yours Brown Seamless Light Control High Waisted Full Briefs
    Yours

    Yours Brown Seamless Light Control High Waisted Full Briefs

    £12.00
    Marks & Spencer M&S 10pk Cotton Lycra® Full Brief Knickers Dark Blue
    Marks & Spencer

    M&S Dark Blue Full Brief Knickers 10-Pack

    £16.00

    Showing 360 of 482

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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.