Thorlos Mens - Womens Thermal Thin Padded Snowboarding Over-the-calf/Tube Socks | XSNB 61% Thor-Wick WARM polyester, 36% Thor-Lon acrylic, 2% Spandex, 1% Nylon Made in US Turn Inside Out-Machine Wash-Use Liquid Fabric Softner Sock fibers provide maximum insulation with superior softness and moisture wicking durability Unique padding in ball and heel to reduce pain by eliminating blisters and pressure points Ventilation panel for extra moisture control Low profile toe seam won't rub or irritate feet