New in box!! Speed. Traction. Lightweight comfort. The SR-1 Tempo Runner is equipped with the latest in foam technology, Surge NRG+ enhanced with supercritical foam for ultimate comfort, response and durable support for any movement. This runner features a lightweight monomesh upper for unmatched breathability that's perfect for interval training, jogging, or walking. It's designed to keep your feet cool and comfortable throughout your exercise routine. Technology - Surge NRG+ enhanced with supercritical foam for ultimate response and durable support for any movement Features - Flex Groove outsole for superior traction - Ultra lightweight stretch monomesh construction - Beveled heel for smooth ground contact - Molded sockliner for comfort and support - Lockdown reinforcement for security and stability - Gusseted tongue to prevent shifting - 4mm heel-to-toe drop - 7.6oz (men's size 9) - 3mm rubber for durability