Getting winded is a thing of the past with the Shock Doctor® Max AirFlow 2.0 Lip Guard. The Max AirFlow 2.0 features 10% more flow capacity, flexible material, and integral bite pads for maximum performance and comfort. Superior Performance Airflow breathing channel for 10% more air flow capacity Design and platform relax the jaw and prevent teeth from blocking breathing channel Comfortable Design Proprietary polymer for flexibility and comfort Integrated bite pads for max comfort No-mold fit Convertible tether for strapped or strapless Easy to clean