In case of tennis arm or golfer's elbow, the Epi Flex applies increased compression to targeted parts of the forearm musculature, relieving the tendons and alleviating pain. The inside of the semi-rigid moulded plastic clip is covered with comfortable Thermoprene material, which is very soft and warm. It also holds the clip in place. The Epi Flex is easy to don and continuously adjustable using a hook and loop closure.