Chest Seal is an airtight hydrocolloid-based wound dressing, packaged at 4 inches x 6 inches (10.5 cm x 15 cm) and weighing 40 grams per piece, specifically designed to seal open chest wounds and prevent pneumothorax. This product features strong medical-grade adhesive that is resistant to water, blood, and debris, ensuring optimal wound closure under various skin conditions. With an easy-to-apply and easy-to-remove design, it is highly suitable for emergency chest trauma care by medical personnel, military units, and field rescue teams.