Under Armourbite Performance Mouthwear Lower Mouthguard (Only Mouthguard Included) Increases Strength-with more airflow and less stress, ArmourBite improves strength by an average of 17-Percent with the ArmourBite mouthpiece and 12-Percent with the ArmourBite Mouthguard Increases Endurance-ArmourBite opens airways. This results in up to 25-Percent less lactic acid build-up after 30 minutes of intense exercise Speeds Up Reaction Time-Athletes respond faster when wearing ArmourBite. Clinical trials show improved response times to both auditory and visual cues Reduces Athletic Stress-Excess cortisol causes stress and fatigue. ArmourBite decreases cortisol levels, so you perform better