Onyx Flotation Jacket (Float Coat). U.S. Coast Guard Approved Type III Life Jacket / Personal Flotation Device (PFD). Safety and comfort combined into one – the Onyx Flotation Jacket offers the comfortable fit and warmth of an everyday jacket, yet provides the safety of a life jacket. The jacket also provides better hypothermia protection than a traditional vest style life jacket when worn in colder weather conditions. Featuring soft flexible foam for all day wear, the Onyx Flotation Jacket is perfect for early and late season boating, fishing and sailing.