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
Marks & Spencer
M&S Black Cotton-Rich Low-Rise Briefs 3-Pack
£14.00
New Look
New Look Yellow Daisy Embroidered Mesh Thong
£3.49
British Boxers
British Boxers Baby Pink Tartan Dressing Gown
£125.00
Marks & Spencer
M&S 5 Pack Microfibre Hipster Knickers Bitter Chocolate
£12.00
New Look
New Look Light Yellow Floral Lace Brazilian Briefs
£3.19
British Boxers
British Boxers Dark Pink Paisley Pyjama Set
£105.00
Marks & Spencer
M&S Nightshade Cotton Rich Lycra® High Leg Knickers 5-Pack
£8.00
New Look
New Look Blue Floral Lace Thong
£6.39
British Boxers
British Boxers Dark Pink Paisley Nightshirt
£89.00
Marks & Spencer
M&S Black Microfibre High Leg Knickers 5-Pack
£12.00
New Look
New Look Yellow Floral Lace Thong
£7.19
British Boxers
British Boxers Teal Check Brushed Cotton Nightshirt
£47.50
Marks & Spencer
M&S 7 Pack Pure Cotton High Leg Knickers Cream Mix
£11.00
New Look
New Look Tan Bonded Micro Thong
£6.39
British Boxers
British Boxers Grey Stripe Brushed Cotton Pyjama Trousers
£39.00
Marks & Spencer
M&S Dark Raspberry Lace High Waisted Knickers 3-Pack
£10.00
New Look
New Look Black Ribbed Seamless High Leg Thong
£7.99
British Boxers
British Boxers Multicolor Bamboo Full Briefs Pack of Four
£32.00
Marks & Spencer
M&S 3 Pack Jasmine Mesh Brazilian Knickers Black
£10.00
New Look
New Look White Ribbed Seamless High Waisted Thong
£7.99
British Boxers
British Boxers Bright Blue Hipster Briefs Pack of Four
£36.00
Marks & Spencer
M&S Pink Shimmer Lace Miami Knickers 3-Pack
£10.00
New Look
New Look Red Floral Lace Thong
£2.99
British Boxers
British Boxers Bright Blue Bamboo Knickers Pack of Four
£28.00
Showing 216 of 353
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.