Engineered with upgraded cushioning, this sock-fit shoe sports a ribbed lacing cage that locks your foot comfortably to the springy foam sole. Responsive Speedboard™ construction moves naturally with your stride to transform every heel strike into an explosive toe-off, with durable, high-abrasion rubber in the tread providing superior grip on city streets, sidewalks and steps—even when they're wet. Cushioning: absorbs impact and distributes weight for consistent, buoyant comfort under each step Breathable mesh allows ventilation of excess heat for cooling comfort Pull-on sock upper with external lacing cage Removable, cushioned insole with arch support Helion™ superfoam cushioning delivers lightweight energy return even in hot and cold temperatures Speedboard construction moves naturally with your foot to transform every heel strike into an explosive toe-off Recycled-polyester textile upper/textile lining/synthetic sole