A chest seal is a critical piece of trauma gear designed to treat open chest wounds and prevent tension pneumothorax -- one of the leading causes of preventable battlefield death. When a penetrating injury compromises the chest wall, a properly applied chest seal creates an airtight barrier that allows the lung to re-expand and maintain function.

Vented chest seals (like the HyFin Vent) feature a one-way valve that lets air and blood escape while preventing outside air from re-entering the wound. They are the preferred choice in most tactical and pre-hospital settings because they reduce the risk of tension pneumothorax developing even after application. Non-vented seals create a fully occlusive seal and are typically used when a vented option is unavailable or when the mechanism of injury calls for full occlusion.

Our chest seal selection comes from North American Rescue and Safeguard Medical -- two of the most trusted names in tactical medicine. Whether you're building out an IFAK, stocking a vehicle trauma kit, or outfitting a team, these seals meet the standards used by military medics and first responders worldwide.