slate is here

cool-toned, clean-lined, and limited edition.

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just dropped

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The Tank - Slate & White

£38 GBP

New colour

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The Workout Thong - Slate & White

£18 GBP

New colour

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The Tank - Black

£38 GBP

Back in stock

model_info=model wears size s

The Workout Thong - Black

£18 GBP

Back in stock

model_info=model wears size s

The Tank - Slate & White

£38 GBP

New colour

model_info=model wears size s

The Workout Thong - Slate & White

£18 GBP

New colour

model_info=model wears size s

The Tank - Black

£38 GBP

Back in stock

model_info=model wears size s

The Workout Thong - Black

£18 GBP

Back in stock

Shop NOW

self-care starts with your underwear

Underdays brings self-care to your top drawer, for the first time. Underwear that puts you first wellness-infused, science-backed, and made to feel as good as it looks. Because comfort, style, and health should never be a choice.


OUR PROMISE


  • • Breathable, non-irritating fabrics that put your health first
  • • OEKO-TEX® certified materials—clean, non-toxic, always
  • • An extra-long antimicrobial gusset for everyday protection
  • • Tested by real women, with over 1,000 five-star reviews
  • • Recommended by leading female health experts


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what they're saying about us