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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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    New Look Women's Black Ruched Back Brazilian Briefs New Look
    New Look

    New Look Black Ruched Back Brazilian Briefs

    £3.49
    Marks & Spencer M&S 3pk Amelia Lace High Leg Knickers Light Steel Blue
    Marks & Spencer

    M&S Light Steel Blue Lace High Leg Knickers 3-Pack

    £14.00
    British Boxers British Boxers Women's "Jura" Tartan Brushed Cotton Nightshirt in Dark Green
    British Boxers

    British Boxers Dark Green Tartan Brushed Cotton Nightshirt

    £80.75
    New Look Women's Pink Heart Lace Sparkly Thong New Look
    New Look

    New Look Pink Heart Lace Sparkly Thong

    £2.00
    Marks & Spencer M&S 3pk Amelia Lace High Leg Knickers Dark Aubergine
    Marks & Spencer

    M&S Dark Aubergine Lace High Leg Knickers 3-Pack

    £14.00
    British Boxers British Boxers Women's "Breezy Blue Satin Stripe" Crisp Cotton Short Pyjama Set in Baby Blue
    British Boxers

    British Boxers Baby Blue Striped Cotton Short Pyjama Set

    £62.48
    New Look Women's Light Grey Heart Print Lace Top Thong New Look
    New Look

    New Look Light Grey Heart Print Lace Thong

    £2.00
    Marks & Spencer M&S 3 Pack Jasmine Lace Trim High Leg Knickers Dark Wine
    Marks & Spencer

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

    £10.00
    British Boxers British Boxers Women's "Boat Blue" Stripe Crisp Cotton Short Sleeve Nightshirt in Light Blue
    British Boxers

    British Boxers Light Blue Stripe Cotton Nightshirt

    £56.74
    New Look Women's Pink Heart Print Lace Thong New Look
    New Look

    New Look Pink Heart Print Lace Thong

    £1.50
    Marks & Spencer M&S 5pk Cotton Lycra® & Lace Full Briefs Praline
    Marks & Spencer

    M&S Praline Cotton Lycra® & Lace Full Briefs 5-Pack

    £12.00
    British Boxers British Boxers Women's "Boat Blue" Stripe Crisp Cotton Pyjama Trousers in Light Blue
    British Boxers

    British Boxers Light Blue Stripe Cotton Pyjama Trousers

    £41.44
    New Look Women's Dark Brown Polka Dot Microfibre Lace Top Thong New Look
    New Look

    New Look Dark Brown Polka Dot Microfibre Lace Top Thong

    £3.49
    Marks & Spencer M&S Clara High Leg Knickers Cream
    Marks & Spencer

    M&S Cream Papertouch High Leg Knickers

    £8.00
    British Boxers British Boxers Women's "Stornoway" Herringbone Brushed Cotton Nightshirt in Teal
    British Boxers

    British Boxers Teal Brushed Cotton Nightshirt

    £80.75
    New Look Women's Black No VPL Short Briefs New Look
    New Look

    New Look Black Microfibre Short Briefs

    £3.99
    Marks & Spencer M&S 5pk Pure Cotton Full Briefs Orange Mix
    Marks & Spencer

    M&S 5pk Pure Cotton Full Briefs Orange Mix

    £8.00
    British Boxers British Boxers Women's Pack of Four "Cherry Pie" Bamboo Hipster Boxer Briefs in Dark Pink
    British Boxers

    British Boxers Women's Pack of Four Dark Pink Hipster Briefs

    £36.00
    New Look Women's Tan No VPL Short Briefs New Look
    New Look

    New Look Tan Microfibre No VPL Short Briefs

    £3.99
    Marks & Spencer M&S 10pk Cotton Lycra® Full Briefs Grey Mix
    Marks & Spencer

    M&S 10pk Cotton Lycra® Full Briefs Grey Mix

    £16.00
    British Boxers British Boxers Women's "Shrub Sage Flower" Crisp Cotton Nightshirt in Pale Green
    British Boxers

    British Boxers Pale Green Floral Cotton Nightshirt

    £40.38
    New Look Women's White Free Cut No VPL Thong New Look
    New Look

    New Look White Microfibre Thong

    £3.49
    Marks & Spencer M&S 5pk Cotton Rich Printed Brazilian Knickers White
    Marks & Spencer

    M&S 5pk Cotton Rich Printed Brazilian Knickers White

    £12.00
    British Boxers British Boxers Women's "Shrub Sage Flower" Crisp Cotton Pyjama Set in Pale Green
    British Boxers

    British Boxers Pale Green Floral Pyjama Set

    £48.88

    Showing 144 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.