Features: Designed to be compatible with all sizes, just slip it on inside your socks and over your shoes and you'll be proud to wear it every day. It's made of silicone and stays on your footbed like a second skin, without gaps and slippage. Additionally, they provide excellent cushioning, enhancing stability and minimizing daily fatigue and discomfort. Provides superior cushioning, enhancing stability and minimizing daily fatigue and discomfort. Silicone allows your skin to breathe and wick away sweat quickly, keeping your feet odor-free. Fits all sizes and types of shoes. Great for men and women. Note: Due to different monitors and lighting effects, the actual color may vary slightly from the image. Please allow 1-3cm deviation due to manual measurement. Specifications: Material: Silicone Size: 2.0/2.5/3/3.5/4/5cm (optional) Includes: 1 pair x silicone insoles