Reebok Grasse RD 2 ST Men's Running Shoes Grey/Black/Colbalt/Pewter : The Reebok Grasse Road 2 ST running shoes have returned with a model designed for runners who need a performance-focused and stable ride. These shoes offer a light and responsive midsole foam that is found in Reebok's more neutral models but is now well-supported by a firm, EVA foam placed along the medial side. Runners taking on some serious mileage will excel in these cushioned and stable running shoes. Upper: Features a breathable mesh upper that wraps around the forefoot and a supportive, Flexweave material around the midfoot and heel. Midsole: The ST offers a stability system made with a large, piece of EVA foam located on the medial side of the heel, helping to guide the foot for more efficiency on the run. Features a more firm and stable feel compared to the Harmony Road or the Floatride models. Outsole: A durable and reliable outsole comes from high-abrasion carbon material that runs along the entire length of the shoe.