eyson inflatable life jacket life vest basic manual (709 green camouflage) eyson this life jacket's air bag is use on neck, need user to put it surround neck after inflated. <br> <br>cover material is waterproof polyester oxford neoprene. <br>air bag material is nylon + tpu. <br>expand time less than or equal to 5s. <br>floating duration is great than or equal to 48h. <br>buoyancy loss after 24 hours: less than or equal to 5%. <br>weight of co2: 33g x 1pcs. <br>accessories: 1 whistle, 2 reflection bands, 1 cylinder, 1 oral tube, 1 eyson inflation device. <br>this life jacket has obtained ce certification. <br> <br>attention: the cylinder is one-off, since it is hard to be transported, we suggest you to buy 1 more co2 recharge set while purchasing the inflatable life jacket for next time.