Brooks T7 Racer Racing Shoes Rearfoot Hydroflow - Silicone system displaces shock impact stabilizing your ride and making for a great landing and take off. High Abrasion HPR Plus - This durable rubber outsole compound offers higher performance than standard carbon black compounds. Pod Tec - This is designed to meet the specific needs of each individual runner. There are anatomically placed pods in the midsole and outsole that bend and flex naturally with each runner, still giving cushioning and support but allowing the shoe to feel not so rigid. Asymmetrical Lacing Design - An anatomically correct lacing environment that reduces potential for irritation and provides improved comfort and fit. Lightweight Upper - Breathable mesh upper keeps your feet comfortable and dry.