The soft EVA material used in mouthguards has a flexible memory, providing a comfortable fit for extended use. Our football mouthguard easy to use, comfort to fit, easily shaped to suit different tooth conditions and sizes. The heavy-duty exoskeleton shockproof frame combines three strategically ventilation holes design, which will allow the air to escape more freely to provide an easier breathing experience and optimal comfort. Besides, each mouthguard comes with a convertible tether that you can attach them to the helmet. First, put the football mouth guard in boiling water for 30s. Second, rinse quickly in cold water. Put it in your mouth, close your mouth and bite the braces with your teeth, and wait for the braces to form, about 30 seconds. Finally, put in cold water to harden the braces. sports mouth guard is suitable for all contact sports where a mouth guard is required or recommended like football, rugby, lacrosse, hockey, MMA, boxing, jujitsu and more. Its a best gift for all youth and adult athletes. Material: EVA colour: black+blue Package Contents: 4 x Mouth Guard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.