Achilles tendonitis is a running injury that typically occurs from abnormal foot stroke in push-off and too-tight calf muscles. The Pro-Tec Achilles Tendon Support provides stabilization and absorbs stress to the tendon. Made from UBL Neoprene, Felt, Cool Max ® mesh, Elastic and Velcro ®, the elastic strap provides lift to heel, helping to prevent sudden stretch or strain to the Achilles Tendon.