Used only twice on a treadmill. No outside use. Awesome shoes, just chose a different style. Features Engineered air-mesh uppers Unique linear last construction adds more volume to the shoes for a comfortable fit inclusive of foot shapes and orthotics High stack of nitrogen-infused DNA LOFT v3 midsole foam delivers soft, smooth comfort and offers just-right softness GlideRoll Rocker actively promotes smooth heel-to-toe transitions for an effortless feeling as you move Midsoles work with GlideRoll Rocker to decrease underfoot pressure for a protective feel and easy landings GlideRoll Rocker can help reduce muscular strain at the ankle joint Stable, broad bases offer inherent stability for a secure feel that doesn't interfere with a neutral stride Lower, 6 mm offset which can reduce strain on the plantar fascia RoadTack and HPR Heel rubber outsoles