Material : Height increase insert is made from environment-friendly silicone, soft, elastic, and washable. Adjustable & Nonslip Design : 5-layer height lifting insoles height up to 1.2in, and each layer with grooves design allows you to adjust the height freely and fix the insoles in place. U Shape Edge Design : U shape edge of the taller shoe pad fits the heel very well, and the little bumps on the surface can massage your heel and relieve the pain & fatigue when you are walking. Functions : Silicone shoe lifts can help to increase your height invisibly, absorb shocks and relieve heel pressure. Comfortable to wear. Application : Half insoles for height are unisex, fit for flats, sneakers, boots, casual shoes, leather shoes and more. (Please adjust the appropriate height of insoles according to the depth of your shoes)