It all starts with our This Grips!™ outsole - two different densities of rubber are strategically placed to ensure the best possible grip for the parking lot and the boot pack. A full-EVA midsole is backed with our impact-resistant Harshmellow™ material, helping to reduce vibration and mellow out the harshest of landings. Less vibration of the ankle means that your feet feel comfortable and fresh all day long.