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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 Black and Red Contrast Trim Micro Thong New Look
    New Look

    New Look Black and Red Contrast Trim Micro Thong

    £1.50
    British Boxers British Boxers Women's Pack of Four "Seagreen" Bamboo Hipster Boxer Briefs in Bright Blue
    British Boxers

    British Boxers Bright Blue Hipster Briefs Pack of Four

    £36.00
    Yours 3 Pack Curve Plus Size Blue & White Lace Back High Waisted Knickers
    Yours

    Yours Curve Plus Size Blue & White Lace Back High Waisted

    £14.99
    Marks & Spencer M&S 2 Pack Asta Rib Brazilian Knickers Black
    Marks & Spencer

    M&S 2 Pack Asta Rib Brazilian Knickers Black

    £12.00
    New Look Women's Black Lace Criss Cross Detail Thong New Look
    New Look

    New Look Black Lace Criss Cross Thong

    £2.00
    British Boxers British Boxers Women's Pack of Four "Seagreen" Bamboo High Leg Knickers in Bright Blue
    British Boxers

    British Boxers Bright Blue Bamboo Knickers Pack of Four

    £28.00
    Yours 2 Pack Plus Size Pink & Black Briefs
    Yours

    Yours Plus Size Pink & Black Floral Lace Briefs 2 Pack

    £14.99
    Marks & Spencer M&S 3 Pack Jasmine Lace Trim High Leg Knickers Dark Wine
    Marks & Spencer

    M&S 3 Pack Jasmine Lace Trim High Leg Knickers Dark Wine

    £10.00
    New Look Women's Red Heart Print Lace Top Thong New Look
    New Look

    New Look Red Heart Print Lace Thong

    £2.00
    British Boxers British Boxers Women's Pack of Four "Forest Berry" Bamboo High Leg Knickers
    British Boxers

    British Boxers Women's Pack of Four Bamboo Knickers

    £14.00
    Yours Plus Size Black Embroidered Full Briefs
    Yours

    Yours Plus Size Black Embroidered Full Briefs

    £7.99
    Marks & Spencer M&S 2 Pack Asta Rib Brazilian Knickers White
    Marks & Spencer

    M&S 2 Pack Asta Rib Brazilian Knickers White

    £12.00
    New Look Women's Red Lace Trimmed Heart Mesh Thong New Look
    New Look

    New Look Red Lace Trimmed Heart Mesh Thong

    £1.50
    British Boxers British Boxers Women's "Sky Blue" Cotton Zip-up Hoodie in Light Blue
    British Boxers

    British Boxers Light Blue Cotton Zip-up Hoodie

    £69.00
    Yours Plus Size 3 Pack Black & Nude Seamless Light Control Full Briefs
    Yours

    Yours Plus Size 3 Pack Black & Nude Seamless Light Control Full

    £22.00
    Marks & Spencer M&S 5pk Pure Cotton Full Briefs Rose Quartz
    Marks & Spencer

    M&S 5pk Pure Cotton Full Briefs Rose Quartz

    £8.00
    New Look Women's Light Yellow Mesh Floral Lace Thong New Look
    New Look

    New Look Light Yellow Mesh Floral Lace Thong

    £3.50
    British Boxers British Boxers Women's Pack of Four "Ice Cream Parlour" Bamboo High Leg Knickers in Light Pink
    British Boxers

    British Boxers Light Pink Bamboo High Leg Knickers Pack of Four

    £28.00
    Yours Plus Size Black & Blue Lace Detail Briefs
    Yours

    Yours Plus Size Black & Blue Lace Detail Briefs

    £8.99
    Marks & Spencer M&S Ida Lace High Waisted High Leg Knickers Blue Tint
    Marks & Spencer

    M&S Ida Lace High Waisted High Leg Knickers Blue Tint

    £6.00
    New Look Women's Light Pink Floral Patterned Lace Thong New Look
    New Look

    New Look Light Pink Floral Lace Thong

    £1.50
    British Boxers British Boxers Women's Pack of Four "Seagreen" Bamboo Full Briefs in Bright Blue
    British Boxers

    British Boxers Bright Blue Bamboo Full Briefs Pack of Four

    £32.00
    Yours Plus Size White Medium Control High Waisted Full Briefs
    Yours

    Yours Plus Size White High Waisted Full Briefs

    £14.00
    Marks & Spencer M&S Stella Lace Thong Black
    Marks & Spencer

    M&S Stella Lace Thong Black

    £12.00

    Showing 288 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.