NIKE Zoom SD 4 Throwing Shoes fabric-and-synthetic Synthetic Leather Upper - For durability, support and great comfort. Midfoot Strap - Attaches to the laces for a secure, comfortable fit. BRS 1000  Located along the outsole for traction and maximum abrasion resistance. EVA Midsole - For long term and durable cushioning. Heel Foam - Improve comfort around heel area with better cushioning.