The Wigwam Ultra Cool-lite Crew Hiking sock is a nice lightweight sock that is perfect for exploring the wilderness. The sock use Ultimax Pro technology enhanced with Dri-release Tencel for rapid moisture evaporation. The socks come up higher on the leg.   Features and Specifications Ultimax® Pro enhanced with drirelease® Tencel® for rapid moisture evaporation Breathable mesh panels Seamless toe closure Fabric  45% Stretch Nylon 22% drirelease® Tencel® (88% Polyester, 12% Tencel®), 29% X2O® Acrylic, 4% Spandex Sizing Table   Wigwam Sock Size Fits Men's Shoe Size Fits Women's Shoe Size UK Shoe Size Europoean Shoe Size Adult Small 4 - 7 3 - 5.5 32 - 38 Adult Medium 5 - 9.5 6 - 10 5 - 8 37 - 42 Adult Large 9 - 12 10 - 13 8 - 11.5 43 - 47 Adult Extra Large 12 - 15 - 12 - 14 47 - 50 Wigwam Ultra Cool Lite Crew Hiking Sock