【SNORKELING VEST】- Inflatable vest provides enough buoyancy while snorkeling. The neon colors provide excellent visibility and SOS whistle, great for learner 【FAST INFLATION & FAST DEFLATION】- Just right fully inflated without the need of excess air. Press and hold blow air valve when inflating or deflating. And the valve will be automatically shut down when loosen it 【ADJUSTABLE WAIST AND CROTCH STRAPS】- Latch straps secures vertically and horizontally, providing a secure and worry free fit, easy pinch buckles for fast removal 【HORSE COLLAR STYLE OVER】- Horse collar design simple to put on and take off. Very comfortable without skin absions, fitting well for most adults. Freely swim like a fish in the water without any oppression 【FLEXIBLE LIGHTWEIGHT AND COMPACT】- Adult snorkeling vest volume is 20 times less than foam life jacket. There is only a folding umbrella size. Easy to carry out with mesh bag on vacations