Check the listing for details. Battle Sports Oxygen Convertible Mouthguard with Lip Guard Protector Mouthpiece. Condition: New with tags. Listed at 17.99 USD. Battle Sports Oxygen Convertible Strap Football Mouthguard There is no substitute. The Oxygen convertible strap 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. Available with convertible strap. Additionally, with the no boiling and maximum protection features, this is the best mouthguard for braces. Choose from a variety of colors to match your gameday fit. Features & Benefits No boiling required Works with braces Helps open TMJ Maximum breath-ability Advanced composite Absorber shield Comes with attachable strap Sizing One Size Fits Most Technology Patented design leverages SCUBA breathing innovations Largest breathing hole on the market Warranty Unlimited Defective Guarantee 5K Dental Warranty with or without braces Items ship on the next business day after cleared payment is received. Business days do not include Saturday, Sunday or Holidays.