MF Heel Cups were developed in 1960 by a track and field professional to assist runners, jumpers and others who suffered from heel pain. Unlike soft heel devices that absorb shock, these hard cups disperse it, and cradle fat pad tissue under the calcaneus to utilize natural cushioning and shock absorption. These hard plastic heel cups cradle fat pad tissue under the calcaneous to utilize natural cushioning and shock absorption and disperse shock. Heat moldable (in hot water). 1 PAIR