The MTI 16gr. Belt pack manually inflatable life jacket gives the SUP paddler the simplest way to meet life jacket requirements and to be wearing a quality safety device for those unforeseen situations. With a quick pull of the toggle a large bladder with a neck strap inflates in front of the user and provides 16. 5 lbs of flotation, equal to the buoyancy of most type III life jackets. This is a type V Coast guard approved device and must be worn to meet those requirements. Wearing this life jacket won't be a problem with the 16gram's low profile design, comfortable waist panel, and simple secure attachment buckle. Includes a moveable D-ring attachment point on the waist belt for car keys or other small item. 16 gram Co2 cylinder included. Specifications: USCG: type V, design buoyancy: 16 lbs. 8 oz. , size: chest size, 30-52", waist belt length, 58. 5".