75% Acrylic 22% Polyamide 3% Elastane. Inner – 100% polyamide. Outer layer grips shoe linings. Inner liner moves with the foot to reduce friction. Anti-bacterial treatment. Ribbed ankle cuff for extra support. Instep ventilation to promote airflow around foot. Anti-creasing system at instep. Under foot cushioning for impact absorption. Ribbed arch support. Flat toe seam for enhanced comfort. 2 pair pack.