Life jacket principles and methods of use

Life jackets are divided into buoyancy principles:  

A buoyancy material-filled life jacket is made of nylon cloth or neoprene, and a buoyancy material is filled in between. Inflatable life jacket: made of high-strength waterproof material, similar to the inflatable life ring or swimming ring principle. Sub-automatic inflatable or passive inflatable. However, the most important thing for this kind of life jacket is to absolutely avoid sharp objects puncturing or breaking the waterproof layer, which can cause unimaginable serious consequences.

Life jacket use method:  

Wear the life jacket whistle bag outwards. Pull on the zipper, tighten the front collar with both hands, and tie the neck strap. The band under the award is tied tightly to the front and left. After you have worn it, check to see if it's tied tightly.