TYR men's runner black silver New not worn No original box but will package carefully for shipping All day comfort and versatility. The upper construction is also a key feature of this shoe, as it provides the perfect amount of breathability to keep you moving comfortably. RD-1 Runner combines a Surge NRG Foam midsole with a durable engineered mesh upper to provide unparallelled comfort and response, while the 10mm heel-to-toe drop maintains support and accelerates power. Designed to complement a runner's natural movement, TYR's RD-1 enhances stride and speed so you can go the distance. - Techknit Engineered Mesh - Surge NRG+ Foam enhanced with supercritical foam for ultimate response and durable support for any movement Features - Lightweight breathability - Secure engineered lacing system - Beveled Heel to assist with landing control - Carbon rubber outsole for maximized traction and durability - Gusseted tongue to prevent shifting - Molded sockliner