Same Energy, More Muscle ToneSpringBoost is revolutionizing everyday fitness footwear with its use of dorsiflexion, which aligns your body and maximizes your workout by toning, strengthening and lengthening your core, leg muscles and glutes.Benefits: Trims and tones legs and glutesReduces pressure on joints and lower backImproves posture by aligning the body Uses energy more efficiently to maximize time spent movingImproves flexibility and range of motionImproves ankle stability and prevents common injuries Features: DORSI technology places the heel lower than the ball of the foot U-Control Insole System with Dorsi 0 & Dorsi 2 insoles Full forefoot Energy Plate for increased range of motion and better use of energy Premium waterproof full grain leather upper 360 degree waterproof, breathable membrane construction High-abrasion resistance toe / heel cap Proprietary rubber outsole formula that grips in all weather conditions Lightweight EVA midsole maximizes comfort and shock absorption Molded TPU shank for motion control and increased stability Tongue construction allows built up heat to quickly disperse and keep the foot comfortable Quick pull lacing system Antimicrobial linings Rugged, self cleaning outsole formula that grips in all weather conditions