Water rescue life jacket is to ensure the safety of drowning floating in the water, prevent drowning clothing. The basic function of professional life jackets is to provide buoyancy, which is provided by buoyancy materials. So, do you know what kind of buoyancy materials are used to fill professional life jackets?

The buoyancy materials of professional life jackets at home and abroad can be divided into three categories:
1, is a natural fiber, commonly used kapok and cork;
2, is a soft closed-cell foam, commonly used polyvinyl chloride, polystyrene, polyurethane, polyethylene, etc.
3. Other new buoyancy materials.

The principle of life jacket can be divided into:
1. Life jacket filled with buoyancy material, which is made of nylon cloth or neoprene and filled with buoyancy material in the middle.
2, inflatable life jacket: made of high-strength waterproof material, similar to the principle of inflatable life buoy or swimming ring. Automatic inflatable or passive inflatable. But the lifejacket should be careful: avoid sharp objects puncture or wear through the waterproof layer, leakage can cause serious consequences.

Life jackets are brightly colored so rescuers can find you from a distance; Second, life jackets generally have the function of protecting your body, so that your body can avoid being hurt. For example, life jackets have the function of guaranteeing that people can float on the water. In addition, when someone sends out a distress signal, lifeguards can easily find trapped people and quickly rescue them.

Life jacket usage:
1. Put the life jacket whistle bag outwards on your body.
2. Close the zipper, tighten the front collar strap with both hands, and tie the neck strap.
3. Tie the lower strap on the front side and the right side.
4. Check whether each place is fastened after wearing.

5, life jacket must fit the body.