HighlightsSurround 105N High Buoyancy - Pull the cord to quickly inflate the inflatable belt pack, providing 100N of buoyancy. The buoyancy can reach 105N after secondary oral inflation. The surround buoyancy airbag brings even buoyant support without pulling it over your head for easier use. Note - CO2 cylinder not included. Please purchase and install a compatible 24g CO2 cylinder with a 1/2-20UNF threaded inflation valveStay Comfortable, Breathe Easy - Our manual inflatable belt pack combines