The Mix Starter KitThis is for you. A first timers exclusive to experience Underdays, thoughtfully designed with your health, comfort, and style in mind. The Starter Kit includes 1 brief, 1 thong, 1 cheeky, and a pouch thats perfect for storing your essentialsthe perfect introduction to the underwear brand that is changing the game.

that lets them pick ultra-comfortable

micro modal fabric keeps you dry for up to 10 hours

there’s no need for an additional bra

This is for you

The ultimate treat

but four-way stretch that moves with you

The Brazilian cut shows more cheek than our brief styles and has a higher cut at the leg

part everyday wear

this 5-pack means you’re covered week is covered

With fast-drying

The Workout Thong's quick-dry fabric is supremely comfortable

Two Black Briefs