This cushioned, grippy trail runner is designed for those who want a lot of protection on even the most rugged trails. Version 4 was updated with a slightly thicker midsole made of the lighter-weight FloatPro foam and a new Vibram Megagrip outsole for even better grip on rock. FLEXconnect dual-directional flex-grooves in the midsole for enhanced ground connection. Agility Peak 4 Trail Running Shoes