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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

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    British Boxers British Boxers Women's "Westwood Pink" Stripe Brushed Cotton Pyjama Trousers in Light Pink
    British Boxers

    British Boxers Light Pink Brushed Cotton Pyjama Trousers

    £65.00
    New Look Women's Black Daisy Mesh Thong New Look
    New Look

    New Look Black Daisy Mesh Thong

    £3.49
    Yours Plus Size 5 Pack Black Cotton High Waisted Full Briefs
    Yours

    Yours Plus Size Black Cotton High Waisted Full Briefs 5 Pack

    £14.99
    Marks & Spencer M&S Clara Papertouch Leopard Brazilian Knickers Medium Peach
    Marks & Spencer

    M&S Leopard Print Brazilian Knickers Medium Peach

    £8.00
    British Boxers British Boxers Women's 'Westwood' Blue Stripe Brushed Cotton Pyjama Set in Light Blue
    British Boxers

    British Boxers Light Blue Striped Brushed Cotton Pyjama Set

    £115.00
    New Look Women's Black Floral-Lace Brazilian Briefs New Look
    New Look

    New Look Black Floral-Lace Brazilian Briefs

    £5.99
    Yours 3 Pack Curve Black Lace Brazilian Briefs
    Yours

    Yours Curve Black Lace Brazilian Briefs 3 Pack

    £14.99
    Marks & Spencer M&S 10pk Cotton Lycra® Full Briefs Black
    Marks & Spencer

    M&S Cotton Lycra® Full Briefs Pack of 6 Black

    £16.00
    British Boxers British Boxers Women's "Jade Regimental" Cotton Satin Stripe Nightshirt in Navy
    British Boxers

    British Boxers Navy Stripe Nightshirt for Women

    £31.50
    New Look Women's Plus Size Black Ribbed Seamless Thong Curves New Look
    New Look

    New Look Black Ribbed Seamless Thong for Plus Size

    £4.79
    Yours 3 Pack Plus Size Black Lace Trim Briefs
    Yours

    Yours Plus Size Black Lace Trim Briefs 3 Pack

    £14.99
    Marks & Spencer M&S 5pk Cotton Modal High Waisted High Leg Knickers Rose Quartz
    Marks & Spencer

    M&S 5pk Cotton Modal High Waisted Knickers Rose Quartz

    £12.00
    British Boxers British Boxers Women's "Westwood Pink" Stripe Brushed Cotton Dressing Gown in Light Pink
    British Boxers

    British Boxers Pink Stripe Brushed Cotton Dressing Gown

    £125.00
    New Look Women's Plus Size Pink High Waisted Lace Thong Curves New Look
    New Look

    New Look Pink Lace Thong for Plus Size Women

    £5.99
    Yours Plus Size White Embroidered Full Briefs
    Yours

    Yours Plus Size White Embroidered Full Briefs

    £7.99
    Marks & Spencer M&S 7 Pack Pure Cotton Miami Knickers Pink Mix
    Marks & Spencer

    M&S Pink Mix Pure Cotton Miami Knickers 7-Pack

    £11.00
    British Boxers British Boxers Women's "Thyme" Cotton Zip-up Hoodie in Pale Green
    British Boxers

    British Boxers Women's Thyme Cotton Zip-up Hoodie in Pale Green

    £69.00
    New Look Women's White Lace Top Microfibre Thong New Look
    New Look

    New Look White Lace Thong in Microfibre

    £2.99
    Yours Plus Size Purple Satin Full Briefs
    Yours

    Yours Plus Size Purple Satin Full Briefs

    £8.99
    Marks & Spencer M&S 2 Pack Cotton Rich Period High Leg Knickers Carbon
    Marks & Spencer

    M&S Cotton Rich Period High Leg Knickers Carbon

    £12.00
    British Boxers British Boxers Women's "Heather Grey" Cotton Oversized Hoodie in Mid Grey
    British Boxers

    British Boxers Heather Grey Cotton Oversized Hoodie

    £69.00
    New Look Women's Dark Brown Seamless Shaping High Leg High Waisted Thong New Look
    New Look

    New Look Dark Brown Seamless High Leg Thong

    £9.99
    Yours Plus Size Pink Floral Lace Brazilian Briefs
    Yours

    Yours Plus Size Pink Floral Lace Brazilian Briefs

    £7.99
    Marks & Spencer M&S 5pk Microfibre High Leg Knickers Rose Quartz
    Marks & Spencer

    M&S Rose Quartz Microfibre High Leg Knickers 5-Pack

    £12.00

    Showing 432 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.