Features: 4 Vent Design: Vented Chest seals should be used when an open chest injury occurs. Chest seals work by closing the chest wall opening to keep collapsed lungs inflated. Large Label Easy Tear Design: Simply hold the seal by the red tab peel away the protective plastic film and apply over the open wound for fast and effective results. Hydrogel Adhesive: Creates a superior lasting seal even in extreme cold and heat. The chest seal has transparent backing to allow for placement directly over the wound and easily conform to the patients chest. Individual Aluminum Foil Bag: Each chest seal comes in a lightweight vacuum sealed puncture resistant package with our Quick Tear seal allowing for fast and easy access. After-service: If you have any questions after receiving the product please feel free to contact us and we will provide you with a satisfactory answer. Specification: Material: Hydrogel Size: 6*6inch Weight: 40g includes: 1 * Chest Closure Patch "