Sold in Pairs Heel Lift Inserts for athletic shoes / trainers Increase heel-to-toe drop by 1/2" Durable polymer construction with No-Slip Cleat Technology to secure inserts in place Small (fits Men's/Women's 6-8.0 US shoes), Medium (Men's/Women's 8.5-13 US), Large (Men's 13.5+ US), The VersaLifts HYBRID is our most versatile heel lift, designed to provide the optimal amount of heel lift to improve squat positioning and range of motion without inhibiting plyometric or running movements. They are perfect for workouts that combine squats, olympic lifts, and plyometrics. Simply insert VersaLifts to gain an additional 1/2” heel to toe drop. (Sold in pairs) Made with the optimal durometer of polymer able to withstand the heaviest loads while strength training. 1/2" heel raise. No-Slip Cleat Technology securing VersaLifts in place. VersaLifts are ideal for: Back Squats Front Squats Overhead Squats Olympic Weightlifting Sizing: Small (Men's/Women's 6-8.0 US) Medium (Men's/Women's 8.5-13 US) Large (Men's 13.5+ US) What is the difference between the HYBRID, the STRENGTH and the ENDURANCE? The HYBRID (Dark Green) is our most versatile heel lift, designed to provide the optimal amount of heel lift to improve squat positioning and range of motion without inhibiting plyometric or running movements. They are perfect for workouts that combine squats, olympic lifts, and plyometrics. The STRENGTH (gray) is our most rigid insert designed to bear the heaviest of loads specifically for strength training. These inserts are ideal for powerlifting and olympic weightlifting. The ENDURANCE (black) is our most compressible insert designed for workouts involving higher volumes of agility, plyometric, and running movements. These inserts absorb shock from impact limiting the amount of stress on joints, bones, tendons, etc.