Automatic inflation when submerged in water, manual inflation by pulling lanyard or by oral tube. Halkey-Roberts 1F automatic inflator with single-point indicator. Features high-visibility reflective tape, emergency whistle on bladder, clear window to view arming status, pocket to store extra cylinder or gear, and D-ring. Heavy-duty nylong outer shell with 3M Scotchlite Reflective material, SOLAS-grade 6755 on front tand 2″ adjustable belt for secure fit. Tri-fold design provides comfortable fit an easy repacking. 33.7 lb. buoyancy when fully inflated Adult universal. USCG Approved Type V for use when worn on uninspected commercial vessels less than 40′ in length, not carrying passenger for hire. Approved substitute for a Type II or III PFD only when worn and used in accordance with the owner’s manual.