What are the Ironman Performance Gel Heel Cushions? The Ironman performance gel heel cushions have been specifically designed to disperse the impact at heel strike ensuring that running & jumping is more comfortable. When can I use the Ironman Performance Gel Heel Cushions? Use the Ironman performance gel heel cushions during a range of sporting activities & to help reduce pain caused by plantar fasciitis & heel injuries. Please Note: Insoles & heel cups are exempt from the 30 day returns policy if they have been worn. How do the Ironman Performance Gel Heel Cushions work? Featuring dual density gel to absorb impact & shock the Ironman performance gel heel cushions ensure that running & jumping is more comfortable & they can also help to reduce pain caused by plantar fasciitis & heel injuries. As the gel cushion helps to slightly lift the heel it means that some pressure can be taken off the Achilles tendon helping to reduce the pain caused by Achilles tendonitis. The heel cushions also feature a slip resistant design. One size fits all.