The ultra-lightweight trainer shoe returns with more technology to help you become your best. Flexible, lightweight cushioningenhances natural motion. Dynamic strap system adds lockdown and stability for high-intensity training. Hyperfuse construction is lightweight, breathable, and supportive. Traditional tongue construction for ease of entry. Internal heel counter for stability. Flight Flex pattern for 360º mobility. Strategically placed rubber for durability and traction. Wt. 9.2 oz.