Features: Fit most people, durable for using, all day available wearing. It can counterpoise the legs muscle make the legs into a straight line. And reduce the bottom of the shoes to fray when you walking. 1 pair of insert insole in a set. Fit for men and women whom have knock-knee or bow leg (O/X type legs), you can fix them according to your own condition. Built-in Soothing Magnets can massage the heel, help you ease leg pain and tire by training the leg muscle. Made of soft and durable medical-grade silicone gel material with magnetic stone, Self-adhesive design can be reused and washed. Specifications: Type: Orthopedic Insoles Material: Silicone gel Color: Transparent Size: M(35-39); L(40-45); S(26-34) Package Size: 15.5*10*1cm / 6.1*3.9*0.4in Package Weight: 47.5g / 1.7oz Package List: 1 * Pair of Orthopedic Insoles