Height increasing shoe insoles with 3.5 Cm (1.5 Inches Appx) Height. These shoe insoles are ideal for long term regular use with low heel shoes such as formal shoes. After all, when it comes to height, every centimetre counts. There is a double side inbuilt adhesive tape at the bottom, which allows you to stick inside your shoe. This make it firmly attached to the shoe. Alternatively you can use it without sticking also. Material is rubber. Its soft, flexible and comfortable. Pack Contains - 1 Pair Insoles (for both legs).