Material Composition Main FabricSurface: Cotton 62.6%, Polyester 37.4% (with adhesive)Base Layer: Polyester 95.1%, Spandex 4.9% Auxiliary FabricSurface: Cotton 64.5%, Polyester 35.5% (with adhesive)Base Layer: Polyester 95%, Spandex 5% (Ribbing excluded)