adidas Springblade Drive Women's Running Shoes Techfit Upper - Contrived for natural, pliable support and a seamless, sock-like fitl FITFRAME - Constructed to deliver lightweight upper protection. TPU Midfoot Cage - Supplies a secure fit and support for unperturbed movement. External Heel Counter - Holds the heel firmly in place for a secure lockdown that doesn't allow the foot to move detrimentally inside the shoe. 16 Polymer Blade Outsole - Each individual blade is angled and appointed to absorb impact from the initial heelstrike and transform this energy into an explosive toe off as the foot transitions through each subsequent phase of the gait.