Tuli’s Heavy Duty Heel Cups are twice as thick as our Classic Heel Cups and offer maximum performance and protection when you need it the most. Tuli’s Heavy Duty Heel Cups offer all the comfort you expect from our Classic Heel Cups while delivering the heavy duty protection you need from heel pain during sports activities such as volleyball soccer basketball and tennis. Tuli s Heel Cups are #1 Podiatrist recommended heel cups in the world. These sever’s disease heel cups work best in athletic shoes cleats work boots and more spacious lace up shoes. They are ideal for treating plantar fasciitis Achilles tendonitis sever’s disease shin splints and general heel pain. Tuli’s Heavy Duty Heel Cups are bio-mechanically designed and have multi-cell multi-layer design that absorbs shock and returns impact energy just like the system naturally found in your feet. Tuli s Heavy Duty 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 Tuli’s Heavy Duty Heel Cups allow you to prevent and treat problems like sore heels and shin splints and help you to maximize your athletic performance. Since they are available in a smaller size Tuli’s Heavy Duty Heel Cups are ideal for treating active children and teens who suffer from Sever’s disease. With Tuli’s brand foot care products we’ve 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 Sizing Guide for Best Fit. The heel cup does not adhere to your feet – Should be worn with shoes.