The Marlin Inflatable Recharge Kit is one of the best products of its type on the market. The recharge kit is a replacement cartridge for manual inflatable personal flotation devices. This recharge kit is perfect for adult flotation devices. With a total mass of 33g, it is extremely lightweight, and wont be noticed when carrying it around on the boat or on the jet ski out on the water. Safety is essential on the water, and a personal flotation device is essential to ensure this. While it is only small, this replacement cartridge is an essential item for any ocean adventure. Dont comprise on safety, make sure you are well-equipped and ready for any situation you may encounter.