description The ACS is a safer approach to treating open pneumothorax and preventing tension pneumothorax in chest injuries from gunshot, stab wounds or other penetrating chest trauma. The unique one-way valve is designed to let air and blood escape while preventing re-entry of either. Proven to be a more effective treatment than standard petroleum gauze, the ACS is standard issue for the U.S. Army and the U.S. Navy. Product Specifications:Clear circular design One-way valve Gauze pad included Strong adhesive Sterile Easy open packageProduct BenefitsOne-way valve to let air and blood escape while preventing re-entry of either Ample dressing size of 5.5 inch diameter Gauze pad for cleaning and drying wound area Clear pad design for optimal visualization of wound Pressure-sensitive adhesive assuring effective seal, even through body hairdownload brochure