Step One underwear
Singles day - 24 hour sale only
Buy 5 get 6 free with free delivery - works out to be $155 delivered. Full price is $35 a pair. Discounted price $14.09 a pair.
Appears to be on men's trunks and women's body shorts only, plenty of variety and sizes left.
To get the deal just add all 11 pairs to your cart and price automatically updates.
I've been wearing step ones for a few years, great quality, no chafing and good longevity.
If you have been wearing them for years, you might want to wash them.