Upgraded and improved, the Shock Doctor Gel Max adult mouthguard provides excellent, high-impact protection and a great, tight fit. Its Gel-Fit- liner moulds comfortably to your teeth, while the Exoskeletal Shock Frame- uses a heavy-duty rubber frame securing you from impacts. What is more, the mouth guard boasts the Multi-Layer Construction- with a shock-absorbing system offering ultimate protection and a custom fit. Plus, there is a convertible tether included allowing you to use it strapped or strapless.