Rubber sole Flyknit upper is stretchy and breathable. Overlays provide a structured, snug fit. Flexible midsole cushioning conforms to foot’s contours. Vapor Max outsole imparts ample bounce and shock absorption. Rubber sole grips indoor and outdoor surfaces for plenty of traction. The Air VaporMax Flyknit 3 is equipped with overlays for a traditional look and snug fit. Inside these running shoes is a flexible cushioned midsole that conforms to the contours of your child’s feet. This shoe also features Vapor Max technology in the outsole to absorb shock and provide plenty of bounce. The Nike Air VaporMax Flyknit 3 has a rubber sole for ample traction on almost any surface.