Designed to turn most unconscious wearers face up with foam-filled collar for additional head support and (2) chest adjusters for improving flotation angle. Constructed of heavy-duty, 210-denier nylon shell and lining with 62 sq. in. of 3M™ Scotchlite™ Reflective Material, SOLAS-grade 6755 on panels and collar. Includes special opening on back to accommodate most brands of fall protection harnesses. Features a USCG-approved whistle with pocket for whistle and light storage. International orange. Universal. USCG Approved, Type I.