If it doesn't say work vest, it's not a real work vest. Ideal for constant wear situations, hot, humid conditions and high mobility requirements. Available exclusively from Mustang Survival, the Inflatable Work Vest is the first of its kind. Designed by Mustang's Innovation Technology experts and built for serious users, Mustang Survival has pioneered the standards for inflatable work vests. With a comfortable and low-profile fit, the MD3188 Inflatable Work Vest offers enhanced mobility and reduced heat stress, allowing crews and professionals to work more efficiently throughout the day. Its 38lb buoyancy rating also means they'll have the added safety of extra flotation when they need it. Bright fluorescent yellow-green inflation cell for improved visibility. Research shows fluorescent yellow green to be the most visible color in a water rescue scenario. Made for the most severe marine environments, the Inflatable Work Vest contains Hydrostatic Inflator Technology (HIT) that offers reliable inflation in a low maintenance design that will only automatically inflate when submerged in 4 or more inches of water, and not inadvertently due to rain, spray or humidity. This technology is exclusive to Mustang Survival in North America and maintenance-free for 5 years from date of manufacture or until inflated. The product also features the patented SecureZip™ closure system to ensure the Vest will stay closed during even the most rigorous activity and still open effortlessly upon inflation.