WEST MARINE Offshore Automatic Inflatable Vest USCG Approved with Sailing Harness for Blue Water Sailing More Comfortable & less restrictive than foam filled PFDs with Extra buoyancy (33.7 lb) for offshore conditions US Coast Guard Approved Activates automatically when immersed, by manual inflation, or by oral inflation tube Built in Harness meets International Sailing Federation requirements Clear window shows inflator readiness