Product Description: The HyFin Vent Compact Chest Seal Twin Pack provides users with two vented chest seals in compact packaging for the treatment of penetrating injuries to the chest. Each vented chest seal is made with advanced adhesive to provide superior adhesion in the most adverse conditions, including sweaty or hairy casualties. Product Demonstration: Features & Details: 3 vented channels: Designed with 3-vented channels that allow air to escape the chest cavity during exhalation but prevent airflow from entering through the injury site during inhalation. Easy to Open: Packaged in a rugged, easy-to-open foil pouch, the perforated packaging allows users to open only one dressing at a time as needed. This twin pack comes with 2 individually sealed chest seals. Small Packaging: Its small packaging is ideal for low-profile kits as you do not have to fold it to get it to fit in your kit, go-bag, cargo pocket, or body armor. Dimensions: Each HyFin Vent Compact Chest Seal is 4.75” x 4.75”.  Usage Scenarios: Gunshot Wounds Stabbings Mass Casualty Events Large Non-Compressible Injuries Where Tourniquets Cannot Be Applied Stay Prepared, Stay Safe. You never know when you will need to be the first responder.