There is no substitute. The oxygen X-Ray football mouthguard is the original patented mouthpiece designed and developed by athletic, dental and medical experts to deliver superior Airflow and better performance. No boiling required, boiling is a thing of the past - this is the new standard in comfort, protection and performance.  Patented design leverages scuba breathing innovations and has the largest breathing hole on the market. We offer an Unlimited defective guarantee and a $5, 000 dental Warrant with or without braces. Available with convertible strap.