The medial and lateral heel wedge insoles provide enough support to relief pressure in the inner part of your knees, perfect for valgum, genuvarum, osteoarthritic knee pain, pronation (inward roll of foot), outward roll of foot, posture problems, treatment of plantar fasciitis, Achilles tendonitis and heel spurs. Help foot comfort Alignment. Wear Medially to correct overpronation counteracting knock knees and ankle eversion. Wear laterally to correct supination, preventing bow-leggedness and ankle inversion sprains. The pronation inserts are made of a soft, silicone - like material with fabric, strong self-adhesive backing so they will stay in place while allowing for repositioning inside of your shoes. Easy to clean and reused. The heel wedge inserts are available for both men and women, one size fits all types of shoes, including sandals, flats, dress shoes, leather shoes, athletic, boots, etc. size:10.4x3.8cm Material:Silica gel colour:White and black and brown Package Contents: 3 x Shoe Insoles Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.