The Nike Force Ultimate Mouthguard is serious protection for the serious athlete. Mouth open or closed, oxygen intake is always maximized thanks to the extended O-Flow breathing channels. Material flexibility creates comfort without distraction, and the bite pad is consistently comfortable with a cushioned feel. The best part – this mouthguard is a Boil-and-Bite design, so it is mouldable, and you can make it your own with a completely personalized fit.