Hand knitted socks made from 55% Bamboo, 37% Cotton and 8% PBT
machine washable at 30 deg. Shoe size 4-7
 
PBT = A lycra-like human-made polymer.  PBT is a natural UV-ray blocker, and much summer wear and sportswear is now being made from this fiber because it’s lightweight, quite stretchy, but not clingy.