Which type of dampener should I choose? There are no cut-and-dry rules, it all depends on your playing style. ADV lets you to test/discover levels of absorption you might not have otherwise experienced. We'd recommend trying each one and see which works best with your racquets and strings. Message us here on Amazon for help - we'd love to help find your perfect feel! What's the dampener made of? It's made of poly-silicone materials. We combined different silicone densities to each type of dampener. The denser the silicone composite, the crisper the feel - while less dense silicone composites have a greater dampening effect but are designed to not lose the feel of the ball. We tested many different combinations of densities and are ultra-confident that we’ve served up ideal mixes. Will they help me play longer? These dampeners will reduce harmful shock to your wrist, elbow and shoulder helping to prevent injury and reduce the wear/tear to your body over the course of many matches.