Fit & Design Standard fit 1/4 socks Seamless toe Cushioned footbed Y-stitched heel creates a natural cup shape for your heel to sit comfortably Sure-fit cuff fits around your leg for a more secure fit Merino wool is soft, breathable, and helps regulate temperature to cool when hot and warm when cool 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 Machine wash cold on gentle cycle, only non-chlorine bleach when needed, tumble dry low, do not iron, do not dry clean, do not use fabric softeners