Nike Vapor Keystone Low BG - Boys' Grade School Nike's Vapor Keystone uses a synthetic leather upper to give you a full range of motion, along with a light, low-to-the-ground feel. Perforations in the toe box provide extra breathability. The front foot is capped with TPU to provide durability against drag. The tongue is mesh for ventilation that will keep your foot cool and comfortable. An EVA sockliner and Phylon™ midsole team up for internal cushioning. The Vapor Keystone's outsole is environmentally-preferred rubber with a 12-cleat configuration. Six supplemental cleats enhance forefoot traction for digging into the dirt. Your power is also increased with the Power Channel that provides more surface contact with the ground. Wt. 8.6 oz.