Under Armour Ultra Lite Ski Socks (1-Pack), Black/Grey, X-Large 85% Acrylic/8% Polyester/4% Nylon/3% Spandex Imported Signature Moisture Transport wicks moisture, accelerates evaporation Flat Knit Footbed Embedded Arch Support helps reduce foot fatigue Seamless Toe for ultimate comfort ArmourBlock helps prevent growth of odor-causing bacteria in the sock Signature Moisture Transport wicks moisture, accelerates evaporation