High Quality Material: Gel shoe inserts made of soft and durable medical grade PU gel material with a strong self-adhesive design so that the insole can be removed and re-adhered to other shoes, the self-adhesive design is reusable and washable with a sweat wicking, non-slip surface layer that allows you to enjoy walking, running, hiking.Medial & Lateral Heel Wedge: Our soft memory gel cushions the heel and adjusts foot alignment, helping aid in improving ankle, knee, hip and back alignment to reduce pain and improve gait.Works For genu valgum (knock knees), genuvarum (bowlegged-ness), osteoarthritis knee pain, pronation (inward roll of foot), supination (outward roll of foot), posture problems, and other issues caused by uneven foot alignment. Use all day while standing, walking, etc.Gray Color Fits Most Shoes: This Orthopedic insoles are suitable for the whole family and are available in three sizes to suit most people. The simple and durable gray color scheme can be matched with any shoes, such as sandals, slippers, running shoes, dress shoes, boots, sneakers, work shoes, leather shoes, etc., providing the best assistance for people who need orthopedic feet.Easy to Use: Wear medially to correct over-pronation counteracting knock knees and ankle eversion. Wear laterally to correct supination, preventing bow-leggedness and ankle inversion sprains.Before using the previous product, make sure your shoes have enough space to accommodate the pads. First clean the shoes and use them after dry, then peel off the plastic film on the bottom,and finally press it lightly to make it firm.Attention: Please don't return your used products to Amazon warehouse, we don't want our next customer to buy the products you have used. Thank you very much for your time. If you are not completely satisfied with your purchase, please feel free to contact us with your order ID and tell us how would you like us to help, our friendly customer service staff will be pleased to assist you with any questions or concerns.