"Kaleidoscope" Spinner Oxygen Football MouthguardThere is no substitute. The Oxygen is the original patented mouthguard designed and developed by athletic, dental and medical experts to deliver superior airflow and better performance. It delivers more oxygen to the muscles for faster recovery, clearer thinking and faster reaction times play after play. Available with convertible strap. Product DNAKaleidoscope spinsNO STRAPNo boiling requiredWorks with bracesHelps open TMJMaximum breath-abilityAdvanced compositeAbsorber shield SizingOne Size Fits Most TechnologyPatented design leverages SCUBA breathing innovationsLargest breathing hole on the market.