Fit & Design Standard fit ankle socks Blister tab reduces hotspots Cushioned footbed Seamless Toe Sure-fit cuff fits around your leg for a more secure fit Y-stitched heel creates a natural cup shape for your heel to sit comfortably Technology Honeycomb arch support cradles your foot for a more comfortable step Additional Details One Purchased = One Donated: For each pair of socks purchased, Bombas donates a pair to those in need SUPIMA(R) cotton is unique due to the extra-long staple fiber that gives fabric premium properties of strength, softness, and color retention Machine wash cold on gentle cycle, only non-chlorine bleach when needed, tumble dry low, do not iron, do not dry clean