Stance Men's Speed Otc Fusion Run Sock, Grey, Sock Size:10-13/Shoe Size: 6-12 51% Nylon, 40% Polyester, 6% Spandex, 3% Cotton Imported Machine Wash Moisture-wicking fibers and graduated compression Air channel cushioning with anatomical fit Anatomical venting thermos regulation Reinforced toe and heel for maximum durability Fit no. 748 the run over the calf, fine knit, medium cushion, active secure support