PURE BOOST X SHOES - COMFORTABLE AND FLEXIBLE SHOES MADE FOR LONG-DISTANCE RUNNING. Let your route fly past in these women's running shoes. boost in the midsole unleashes energy with every stride to keep you moving light and fast. Made for runners with a neutral gait, the shoes' snug, sock-like upper delivers nonrestrictive arch support Weight : 6.5 ounces (size 7); Runner type : natural; Midsole drop : 9 mm (heel : 25.5 mm / forefoot : 16.5 mm) boost's energy-returning properties keep every step charged with an endless supply of light, fast energy STRETCHWEB rubber outsole is lightweight and elastic, adapting to the ground for stability and working strategically to optimize the unique properties of boost from touchdown to push-off Lightweight synthetic and textile upper for durability. Customizable lacing system to lock down fit; Adaptable midfoot construction allows upper to move with foot to enhance fit around the arch. Rubber outsole for excellent grip.