Material: The height increase insert is made of environmentally friendly silicone, soft, elastic and washable. ADJUSTABLE & NON-SLIP DESIGN: 5-layer height-lifting insoles are up to 1.2in high, and each layer with grooves design allows you to adjust the height freely and fix the insoles in place. U-shaped edge design: The U-shaped edge of the taller shoe pad fits the heel well, and the small bumps on the surface can massage your heel and relieve pain and fatigue when walking. Functions: The silicone shoe lifters can help you increase your height invisibly, absorb shock and relieve heel pressure. Comfortable to wear. Usage: unisex half height insole, suitable for flat shoes, sneakers, boots, casual shoes, leather shoes, etc. (Please adjust the appropriate height of the insole according to the depth of your shoes)