Made with World Finest Bamboo-Viscose Fiber ;Bamboo-Viscose fiber will help with many odor problems.

Also it makes the socks breathable absorbent, deodorant and durable to keep your feet dry and cool.

M size should fit no problem for shoes size 4 to 8.

L size fit for 8 to 11.

Bamboo-Viscose fiber is more durable than cotton, and more comfortable and Odor resistant than POLYESTER Suitable for many occasions formal & informal Machine Washable Best socks to keep feet cool and dry.he fiber is Silky, you could tell is Bamboo-Viscose not cotton.