adidas Performance adizero Prime SP Running Shoe with Spikes 100% Suede Imported Synthetic sole Weight: 3.5 ounces (men's size 9) SPRINTWEB seamless upper with laminate composite; SPRINTPLATE landing shelf designed to keep foot in ideal position to optimize forward momentum to lock the foot down during high-level acceleration while maintaining a barefoot feel adizero Nano Plate transfers power through the whole footwhile reducing torque on the midfoot to maximize energy return Laser-welded Spaceframe in midfoot for maximum support Nanoceramic compression pins are 66% lighter than similar steelpins