From Website: Heel strap and leather on the sides stabilize your fit Stretchy bootie design makes it easy to slip your foot in with a snug and secure feel Breathable fabric on the front of the shoe is lightweight and helps keep feet cool Pull tabs on the heel and tongue help you take the shoe on and off Durability & Traction: Back of the shoe features foam that creates a wing-like shape around the heel for extra stability when moving in different directions Flexible foam sole is designed with deep grooves so every step and stride feels secure Sole's pattern also helps with multisurface traction Toe tip is reinforced with extra durability for toe draggers From a non smoking environment🪴 Brand new Nike Flex without box Fast shipping! Size 3.5