Features: Non Slip: Self adhesive design make the insoles stay in place all the time. Also, you can wipe off the stickys residual from the pads to reuse it. The strong stickys heels cushion pads are equipped with strong adhesive properties. Premium Material: Made of soft gel material which is easily washed, reusable. It is suitable for daily use and are absolutely invisibles. Support any side of the foot according to the required support to help the O-leg and X-leg orthosis. For leg orthosis, it is very helpful to prevent-bow and leg valgus or varus. Easy to Use: Wear medially to correct over-pronation counteracting knock knees and ankle eversion. Wear laterally to correct supination, prevent bow-leggedness and ankle inversion sprains. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement 3. It can be freely stacked at different heights for different degrees of XO-leg symptoms, and it is stickys after tearing the transparent film at the bottom. Thickness: 3 layers of 6 pieces: 2cm/2 layers of 4 pieces: 1.5cm/1 layer of 2 pieces: thickness 1cm. Package List: 2/4/6pcs Medial/Lateral Heel Wedges Silicone Insoles