Tuli\'s Heel Cups are 1 Podiatrist recommended heel cups in the world. Tulis Classic Heel Cups are ideal for those suffering from heel pain and aching feet. The Tulis Classic Heel Cups work best in all shoe styles because they are supportive yet flexible enough for any shoe. You can have lightweight support and cushioning all day long for any daily activity. They are ideal for treating plantar fasciitis, Achilles tendonitis, shin splints, and general heel pain. Tulis Classic Heel Cups are bio-mechanically designed and have a multi-cell, multi-layer design that absorbs shock and returns impact energy just like the system naturally found in your feet. Tuli\'s Classic Heel Cups provide immediate heel pain relief by cushioning the area of pain and elevating the heel bone. The additional cushion and elevation you get when you use these plantar fasciitis heel cups allow you to prevent and treat problems like sore heels and shin splints. These cushioned heel cups are ideal for everyday walking, running & standing, promoting stability & proper alignment, and cradling & protecting your heels. With Tulis brand foot care products, weve scientifically duplicated the shock-absorbing design naturally found in your feet to maximize shock absorption and keep the back, feet, knees, and hips in alignment. Nothing works better or last longer than your Tuli\'s heel cups. For best results allow time to become familiar with the feel of your heel cups. Best worn outside of socks. Refer to the Sizing Guide for the best fit. The heel cup does not adhere to your feet - Should be worn with shoes. Fits in almost any shoe.