MEDIAL & LATERAL HEEL WEDGE: 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. 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. MATERIAL: Made of durable and soft PU gel material with sweat wicking, anti slip top layer, and it has strong self-adhesive backing so they will stay in place while allowing for repositioning inside your shoes or trim-to-fit. FIT MOST SHOES: These orthotic Inserts are available for both men and women and fit all types of shoes, such as running shoes, dress shoes, boots, sneakers, work shoes, leather shoes, and so on. RISK FREE: If you are not satisfied with this purchase, please feel free to contact us with your order ID and tell us how would you like us to help, we will try our best to offer the most responsible solution. Our products are packed with reuseable ziplock bag, easy to open and seal. The return would be a lot easier when the package is intact. Thank you very much for your time.