A life jacket is made in order to help people float, or keep their heads from going under water wherever there are bodies of water or swimming pools. They are found near pools, lakes, boats, planes, ships and are located with in easy reach of passengers and crew to be used in case of an emergency or to wear as a extra layer of protection.
It is very important to wear life jackets when out on the water, no matter what kind of activity people may be doing. They are buoyant by design, which means that they float without any kind of assistance from those that wear them.
Life jackets are made generally of strong and durable synthetic fibers that cover a buoyant object such as foam or air balloons. They are made in bright colors such as red, yellow and orange in order to be easily spotted by rescuers in case of an emergency.
The earliest recorded use of life jackets point to Norwegian seamen who would use simple chunks of cork or wood that would help people float in case they were to fall overboard while at sea.
The life jackets that we see today are thought to be invented in the 1950’s in the United Kingdom by Captain Ward. He was a Royal National Lifeboat Institution inspector, and it was he that made a vest stuffed with cork as a buoyancy device.
There are numerous types of life jackets on the market today which include a foam based core. Additional materials include deep water, air chamber models, underwater versions as well as specialized styles. Foam core ones are the easiest to make and wear, but the least buoyant. Air chambered ones are used on board large transport ships and aircraft.
These particular models are designed with a vinyl based material that wrap around inflatable air chambers. There are much more buoyant than foam ones. The deep water ones are designed for deep water and are commonly referred to as wet or dry suits.
Underwater life jackets are worn by divers as well as swimmers in order to help with buoyancy when they are diving. There are also certain specialized models that adventure sports participants put on when they are on the water.
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