Sucking chest wounds require an emergency first aid solution that is fast, direct, and effective: the H&H Bolin Chest Seal (BCS) is specifically engineered to meet these critical needs. The BCS is a sterile occlusive chest wound dressing for treating open pneumothorax and preventing tension pneumothorax that result from gunshots, stab wounds, or other penetrating chest trauma. The patented (US Patent No. 7,834,231) failure-proof triple-valve design of the BCS allows air and blood to escape while preventing the re-entry of either, thereby eliminating any unwanted gas or liquid exchange at the trauma site.