The Battle(R) Oxygen Lip Protector offers excellent protection combined with performance-enhancing airflow. The Oxygen lip guard features a 293% larger breathing hole than competitor models resulting in 184% better airflow. More efficient breathing lead offers several benefits including faster recover, clearer thought and better decision making. FEATURES: Includes 1 lip guard 293% larger breathing hole than competitor designs 184% better airflow than competitor designs Designed by dental, medical and athletic professionals for exceptional performance Promotes proper jaw alignment Use increases overall oxygen, breathability and performance Increased oxygen benefits include faster recovery, increased performance, clearer thought, increased oxygen to muscles and brain, and better decision making Battle Sports Science