APL: Athletic Propulsion Labs Women's Techloom Phantom Running Shoe 100% Textile Imported Rubber sole Low-cut running shoe featuring 3D Stretch TechLoom upper with intricate grid pattern designed to move with your feet Neoprene tongue with integrated collar offer exceptional fit and all-day comfort Midsole/outsole compound enables the use of less rubber on the outsole, significantly reducing weight Propelium midsole is designed to maximize energy generation and provide superior comfort that will maintain structural integrity longer than conventional EVA Inspired by the shape of a feather, the outsole incorporates natural motion flex grooves that react to every movement.