Chest seal used for the treatment of open chest wounds. It is designed for simple, consistent performance in the field as a tool in prevention and treatment of pneumothorax. Advanced adhesive works on wet or hairy skin and is compact in size to fit neatly in individual first aid kits. Two seals per pack allow entry and exit wounds to be treated and the design is valve-free. The chest can be vented with the easy-grip tab and adhesive re-seals. The seals are latex-free and are suitable for injuries up to 15cm maximum length. Adhesion performance maintained at -18 degrees and 55 degrees.