Tired of getting holes in your chest cavity? So were we. Our innovative design provides 4 vented channels designed to prevent airflow into the chest cavity during inhalation while allowing air to escape through the vent channels during exhalation. The 4 vent channels are designed to allow blood to escape and also provide a backup fail-safe system, as even if three of the four channels become obstructed, the vent is designed to remain fully operational.
+Advanced adhesive technology designed to overcome blood, sweat, tears, Mountain Dew, melted chocolate, and the hairiest of dudes.