NIKE Kids Shox NZ SI Plus (GS) Cl Grey/Vnm Grn/Lt Bs Gry/Blk Running Shoe 4 Kids US Leather-And-Mesh Rubber sole Shox technology 4 puck Shox cushioning Nike Shox four column heel unit and a Phylon forefoot makes for responsive cushioning Secure gilly lacing system locks the foot in place for support