The FIRST and ONLY lifejacket to have earned four regulatory approvals in one compact design. After several years of extensive design and testing, Mustang Survival is proud to announce the all new 4-ONE. Approved to USCG SOLAS, TC SOLAS, MED SOLAS, INTERNATIONAL SOLAS and USCG Type I standards, the 4-ONE eases both the hassle and financial burden associated with compliance to a variety of vessel regulations.