【EVA Material】 The football mouth guard is made of EVA material, you can put it in your mouth with confidence, basketball mouthguard is highly malleable and becomes very flexible after being heated. The mouth guard football features a three-layer design with a gel fit lining and a shock-absorbing exoskeleton frame that provides shock-absorbing protection for comprehensive oral protection when you get hit hard. 【Vent Design】 The football mouthpiece is designed with three strategically ventilation holes, which can circulate the air faster, providing you with more oxygen, and make you breathe more smoothly. Each football mouth guard youth has a convertible tether that attaches to the helmet, allowing the use of a strapped or strapless mouthguard for easy portability. 【How To Use】 First put the braces into boiling water for 30 seconds, take out the braces and use cold water to quickly clean the braces. Then put it in your mouth and adjust the sports mouthguard to a comfortable bite position so that the mouthguard fits better your teeth. Wait for the braces to form for about 30 seconds. Finally, place in cold water to harden the braces. Note: The data are manual measurement, please allow a 1-3cm error, due to the differences between the light and the display, there will be a certain color difference, the specific received in kind prevail.