Searchself Men's Cotton No Show Liner Socks 80% cotton Material: 80% cotton so keep your feet cool and comfortable. Long lasting and machine washable. Air dry only. Ddesigned to be invisible: Premium Quality, Great Fit and 100% no show. Slip resistant: Large silicon grip on heel to prevent slipping . Stay on your feet! Best fit: US mens shoe size: 7-10 Six colors: Available in White, Grey, Black,Navy blue,Water Blue and Green, six colors.