Material: PVCAdd Height: These incredible footpads allow you to add height in the blink of an eye. Whether it's sneakers, dress shoes or loafers, you can insert them into almost any type and look taller. The best part is that these lift heels are still hidden so that no one knows the secret behind your height gain.Breathable Design: Improves comfort, the insole has an air-cushion cap that provides great comfort to your heel, allowing you to feel relaxed throughout the day. The maximum thickness is also limited to an optimum value to ensure it doesn't make your shoes too tight.UNIVERSAL DESIGN: These come in 2 pairs, for left and right feet, with 5 different options, allowing you to choose the number of layers and heights you want The insole fits both men's and women's shoes and can be easily removed when you don't want to use it.