1 pair of Underdays =
✔️ 50 rounds of user-testing
✔️ Designed with a gynaecologist
✔️ Solutions-driven fabrics
✔️ Made in Europe
What they're saying about us
"The best briefs"
"This female founded lingerie brand is about to become your latest obsession"
"This intimates label serves a new generation of empowered women."
"The underwear brand that's rewriting sexiness"
Introducing the Thong Starter Pack
New to Underdays? It's time to invest in feeling good–– try our Thong Starter Pack which brings together our three bestselling styles for less.
Three collections designed to target your biggest pain points
We're changing the gusset game
Your gusset is that internal lining in your underwear that gets up close and personal with your most intimate parts. For too long, gussets have been too short and not given you enough coverage. At Underdays, we worked with a gynaecologist to change the gusset game. We added length and swapped cotton for bamboo—a more breathable and hygienic fabric for your body.
Refer your friends & get a free pair of Underdays
Make them feel just as good as you do—give your friends 10% off and you'll get a free pair of Underdays when they shop with your link.