A note from Underdays

Redefining Underwear Through Wellness

WHERE IT BEGAN:

With everything underwear was getting wrong

Most underwear is synthetic. It traps heat and moisture against the most sensitive skin on your body, and it's designed for how it looks on a hanger rather than how it feels at 6pm.


WHAT WE MAKE

Underwear that doesn't compromise

Breathable fabrics, chosen for how they feel after ten hours. An extra-long gusset as standard. No digging in, no riding up, no VPL. Every fabric OEKO-TEX® certified and free from anything harmful.

OUR MISSION

The layer you think about least

We're woman-led and built with our community. We obsess over fit and fabric so you don't have to think about what you're wearing underneath — on the days that matter and the days that don't.


Underwear as ritual. Never an afterthought.


Meet the Starter Kits

FAQs