As featured in Runner's World, T3 and Cosmopolitan Mid-length Reflective yarn integrated at the cuff of the sock Lycra bands to optimise fitting Super thin construction for extra feel Air vent channel stitching on upper foot Extra lycra on arch for added support Blended material use: Polyamide (88%), Lycra (8%), Flash (4%) Colour: Yellow, Pink, Black; Size: 4-6, 6.5-8.5, 9-11