Break new ground in the Adidas Springblade Razor.A seamless,foot-hugging techfitTM mesh upper adds to the sleek form of these cutting-edge runners.techfitTM upper is engineered for natural,flexible support and a seamless,sock-like fit Fully welded air mesh upper with no seam for improved fit,comfort and modern look Comfortable textile lining External heel counter for stability and a smooth ride.