The HyFin Vent Compact Chest Seal Twin Pack provides users with 2x vented chest seals in a compact packaging for the treatment of penetrating injuries to the chest. Gone are the days of trying to awkwardly fold chest seals to fit in your trauma kit. Designed with 3-vented channels, the HyFin Vent allows air to escape the chest cavity during exhalation,while also preventing air from entering through the injury during inhalation. Each HyFin Vent Compact Chest Seal is 12cm x 12cm and made with advanced adhesive to provide a superior adhesion in the most adverse conditions, including sweaty, bloody or hairy patients. Packaged in a rugged, easy-to-open foil pouch, the perforated packaging allows users to open only one dressing at a time as needed. It 's compact packaging is ideal for low profile or small immediate trauma kits as you do not have to fold it to get it to fit in your trauma kit, go-bag or cargo pocket.