A legendary sneaker celebrates its return: the Nike Air Max Sunder, a popular cross-trainer that first appeared in 1999, is back. This retro version retains all the original details that made the Sunder a fan favorite. The upper is made of neoprene with a signature zippered cover that covers the lace bed. A nubuck leather guard provides durability and keeps dirt out, while two pull tabs at the heel allow for easy on and off.