CORRECT LEG LENGTH DISCREPANCIES - Inconsistent leg lengths can lead to unbalanced body posture, which puts the spine and pelvis in an abnormal position, which can lead to low back pain, neck pain, hip injuries, and other problems. Our adjustable heel lifts are a very effective solution to help you easily correct leg length discrepancies and maintain balance and stability 4 LAYERS ADJUSTABLE DESIGN - DR. POTTER+ height increase insoles has a removable design with 4 layers, each layer 1/4 inch thick (1/4 inch = 6.4 mm = 0.64 cm), adding a total of 1 inch (2.5 cm) of height. These layers can be used individually or in combination, and you can adjust the height by adding more layers to suit your needs EFFECTIVE HEEL PAIN RELIEF - These heel cushion inserts are made from a superior gel material that provides comfortable support while walking and standing for long periods of time, helping to relieve foot pain, and are highly effective for leg length discrepancies, heel spurs, heel pain, sports injuries, Achilles tendonitis, and other clinical conditions SUITABLE FOR MOST SHOES - The Gel heel inserts have a strong self-adhesive back to keep them in place in the shoe without harming the shoe, suitable for all types of shoes such as running shoes, formal shoes, boots, sneakers, work shoes, leather shoes, etc. They are easy to use and reusable after washing and air drying for both men and women DR. POTTER+ 4 Layers Adjustable Height Increase Insoles, 1 Inch Heel Lift for Leg Length Discrepancies, Heel Cushions for Heel Spurs and Heel Pain, Heel Inserts for Women and Man