Non-Slip: Self-adhesive design helps the insoles stay in place. The adhesive heel cushion pads feature strong adhesion and can be cleaned and reused after removing residue. Premium Material: Made of soft gel material, easy to clean and reusable. Suitable for daily use and designed to be low-profile. Provides support as needed for foot alignment. Supports proper foot positioning to help with leg alignment concerns. Easy to Use: Place medially to help correct over-pronation, counteract knock knees, and ankle eversion. Place laterally to help correct supination, prevent bow-leggedness, and reduce risk of ankle inversion sprains. Note: 1. Actual color may vary slightly due to lighting effects. 2. Allow 13 cm variation due to manual measurement. 3. Can be layered at different heights to accommodate varying needs. Adhesive activates after removing the protective film. Thickness options: 6 pieces (3 layers) 2 cm; 4 pieces (2 layers) 1.5 cm; 2 pieces (1 layer) 1 cm. Package List: 2/4/6 pcs Medial/Lateral Heel Wedge Silicone Insoles