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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 "Stornoway" Herringbone Brushed Cotton Pyjama Trousers in Teal
    British Boxers

    British Boxers Teal Brushed Cotton Pyjama Trousers

    £55.25
    EGO Rita Clear Perspex Thong Strap Block Heeled Mule In Brown Faux Suede, Women's Size UK 3
    EGO

    EGO Brown Faux Suede Block Heeled Mule

    £27.00
    New Look Women's Light Pink Seamless Lace Trimmed Ribbed Jersey Thong New Look
    New Look

    New Look Light Pink Seamless Lace Trimmed Ribbed Jersey Thong

    £7.99
    Marks & Spencer M&S 5pk Cotton Rich Lycra® High Leg Knickers Blueberry
    Marks & Spencer

    M&S 5pk Cotton Rich Lycra® High Leg Knickers Blueberry

    £7.00
    British Boxers British Boxers Women's Pack of Three "Amusements" Cotton Full Briefs
    British Boxers

    British Boxers Multicolor Cotton Full Briefs Pack of Three

    £21.25
    EGO Rita Clear Perspex Thong Strap Block Heeled Mule In Beige Faux Suede, Women's Size UK 3
    EGO

    EGO Beige Faux Suede Block Heeled Mule

    £27.00
    New Look Women's Light Blue Floral Lace Thong New Look
    New Look

    New Look Light Blue Floral Lace Thong

    £7.99
    Marks & Spencer M&S 3 Pack Jasmine Mesh Brazilian Knickers Pink Shimmer
    Marks & Spencer

    M&S Pink Shimmer Mesh Brazilian Knickers 3-Pack

    £10.00
    British Boxers British Boxers Women's Pack of Three "Kohl Black" Cotton Full Briefs in Black
    British Boxers

    British Boxers Kohl Black Cotton Full Briefs Pack of Three

    £21.25
    EGO Direction Thong Strap Square Toe Slingback Heel In Black Faux Leather, Women's Size UK 3
    EGO

    EGO Square Toe Slingback Heel in Black

    £29.00
    New Look Women's Light Blue Daisy Mesh Thong New Look
    New Look

    New Look Light Blue Daisy Mesh Thong

    £3.49
    Marks & Spencer M&S 5pk Cotton Lycra® Full Briefs Bitter Chocolate
    Marks & Spencer

    M&S Bitter Chocolate Cotton Lycra® Full Briefs 5-Pack

    £8.00
    British Boxers British Boxers Women's "Breezy Blue Satin Stripe" Crisp Cotton Short Sleeve Nightshirt in Baby Blue
    British Boxers

    British Boxers Baby Blue Cotton Nightshirt

    £52.96
    EGO Arrie Clear Perspex Thong Strap Heeled Mule In Nude Patent, Women's Size UK 3
    EGO

    EGO Chic Nude Patent Thong Strap Heeled Mule in Beige

    £30.00
    New Look Women's Black Ribbed Scallop Edge Brazilian Briefs New Look
    New Look

    New Look Black Ribbed Scallop Edge Brazilian Briefs

    £5.99
    Marks & Spencer M&S 3pk Cotton Rich Full Briefs Opaline
    Marks & Spencer

    M&S Opaline Cotton-Rich Full Briefs 3-Pack

    £8.00
    British Boxers British Boxers Women's "French Navy" Cotton Joggers in Navy
    British Boxers

    British Boxers Navy Cotton Joggers for Women

    £32.73
    EGO Barrett Gem Thong Strap Heeled Mule In Black Faux Suede, Women's Size UK 3
    EGO

    EGO Glamorous Thong Strap Heeled Mule in Black

    £29.00
    New Look Women's Bright Pink Animal Pattern Lace Thong New Look
    New Look

    New Look Bright Pink Animal Pattern Lace Thong

    £1.50
    Marks & Spencer M&S 2 Pack Amelia Lace Cotton Rich Shaping Knickers Rose Quartz
    Marks & Spencer

    M&S Rose Quartz Cotton-Rich Shaping Knickers

    £12.00
    British Boxers British Boxers Women's "Breezy Blue Satin Stripe" Crisp Cotton Mid-Length Dressing Gown in Baby Blue
    British Boxers

    British Boxers Baby Blue Cotton Robe

    £68.43
    EGO Bunni Thong Strap Detail Wedge Heel In Black Faux Leather, Women's Size UK 3
    EGO

    EGO Black Thong Strap Detail Wedge Heel in Black Faux Leather

    £27.00
    New Look Women's White Two Tone Floral Lace Brazilian Briefs New Look
    New Look

    New Look White Floral Lace Brazilian Briefs

    £5.39
    Marks & Spencer M&S 5 Pack Cotton Lycra® Brazilian Knickers Bitter Chocolate
    Marks & Spencer

    M&S 5 Pack Cotton Lycra® Brazilian Knickers Bitter Chocolate

    £8.00

    Showing 96 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.