Injinji Unisex Yoga Micro Crew Toesocks 70% Coolmax FreshFX/ 25% Nylon/ 5% Lycra Imported 70% Rayon from Bamboo25% Nylon5% Lycra Slip resistant sole has raised non-toxic treads for superior grip Machine wash on warm or hand wash your toesocks after each use, and line dry Provides added protection from gym floors and mats while keeping feet cool and comfortable during exercise Made in Taiwan