SIZE: Medium - Women Shoe Sizes 5 -10.5, Men Shoe Sizes 3-9 (Sock Size 9-11) Exclusive Ecosox construction wicks away moisture Arch support to help fight foot fatigue Helps control and prevent foot odor Non-Binding Top For Improved Blood Circulation EcoSox Diabetic Performance Quarter Sox are Woven from Bamboo Viscose Fibers. Perfect solution for Diabetics that may experience swelling (edema) or suffer from diabetic nerve pain (neuropathy). EcoSox non-binding tops are relaxed fit so not to bind or inhibit blood flow but have just the right amount of tension to keep them on your leg.