The Under Armour HOVR Sonic 2 Running Shoe has become a favorite for runners who like distance but want flexibility in their shoes. To accomplish this, Under Armour constructed the Sonic 2 with UA HOVR technology that provides what Under Armour calls a "zero gravity feel." Basically, its Energy Web midsole consists of compression-molded mesh that seeks to eliminate impact step after step. The result is a feeling that you're barely hitting the pavement at all. A midsole this innovative deserves the best upper and sole, so Under Armour fixed it with a seamless, flexible, breathable upper and a heel counter that locks in the fit. The sole has blown rubber under the forefoot for proper traction and added cushioning, and high-abrasion rubber in the heel and toes so you can expect durability, longevity, and flexibility.