Altra Trail Gaiter 85% Polyester And 15% Spandex Imported Small size:(M 7-9.5/w 5-11), large size: (m10-14/w 12) Shields your feet from dirt, sand, mud, Rocks and snow Compatible with any Altra trail shoe or other shoes with glue-on kit Water-repellent, stretchable fabric with high abrasion resistance Low-profile design