Lock Adjustment : This easy-to-use adjustment memorizes your shoe size for all your snowshoeing outings. Tightening through a ratchet system for a secure and fast fit Lateral Adjust : offer greater comfort with their side adjustment systém that will accept any width of shoe to give maximum foot surround. Sound and Shock Absorbing System (SSAS). Heel lift : facilitates hiking during long climbs,reduces calf muscle fatigue. Heel block : only for transporting or storing snowshoe.