In many respects, the lifespan of a life jacket mainly determines how we use it, and we need to store it in a place where there is no sunlight. If sunlight contains UV rays, it will reduce the performance of synthetic materials. Excessive exposure to high temperature and high humidity environment will shorten its service life. We know that these factors degrade material properties and that each use environment is different, so there is no definite way to estimate its useful life. For this reason, we must follow maintenance and cleaning instructions and perform maintenance and performance checks. This ensures the longest lifespan of the life jackets for adults. Failure to follow these instructions can cause the lifejacket to malfunction, resulting in injury or even death.