NIKE Men's Zoom Cage 2 Tennis Shoe Synthetic Weight: approx. 14.4 oz. Upper: A forefoot NIKE Drag-on Cage provides protection during specific tennis sliding movements without sacrificing breathability. Midsole: Encapsulated NIKE Zoom Air in the heel provides a low profile ride that is also incredibly responsive with medial mid-foot shank. Outsole: Zonal high abrasion patterns for maximum durability. Various herringbone patterns provide traction on various court surfaces.