FLASHFILM™ polyurethane midsole is lightweight and ultra responsive on every stride Designed for: High-intensity training Rubber outsole provides traction and durability Mesh upper for breathability and temperature management Train hard, keep moving. These men's shoes are lightweight, breathable and comfortable for fast-paced workouts. They have a mesh upper to keep your feet cool as you up the intensity, while the FLASHFILM™ midsole is super lightweight and responsive.