Commercial grade life jackets or immersion suits are required to have for each crew member aboard a commercial vessel. Kent, Datrex, Flowt, and Imperial all make different versions of Type I and Type II life jackets that are suitable for crew members in case of an emergency. If you’re looking for something a little more comfortable, immersion suits or a work vest by Mustang will allow you more flexibility and maneuverability, while still maintaining the safety features of an inflatable life jacket.