Check the listing for details. Battle Sports Oxygen Convertible Mouthguard with Lip Guard IRIDESCENT. Condition: New with tags. Listed at 19.99 USD. Battle Sports Oxygen Mouthguard The Oxygen mouthguard features a larger breathing hole than its competitors, enabling athletes to perform at the top of their game. Unrestricted breathing aids in improved athletic performance and the thin, flexible lip guard makes the Battle Oxygen one of the most comfortable football mouthguards on the market. This mouthguard is convertible; it may be worn strapped or un-strapped.Oxygen Mouthguard Features: One size; Recommended for ages 10 and up293% larger breathing hole than leading competitorMore oxygen available to the muscles and brainFaster recovery periodIncreased performance time, duration, and intensityConvertible; may be worn strapped or un-strapped Items ship on the next business day after cleared payment is received. Business days do not include Saturday, Sunday or Holidays.