The fabric of swimwear is mostly made of nylon and polyester threads and spandex threads. Among them, the most suitable fabric for swimwear is nylon fabric, and the composition of nylon fabric is spandex and nylon.

    The advantages of nylon spandex swimsuits are bright colors, comfortable to wear, elastic, not deformed after repeated wearing, fast dripping, and easy to wash and dry. The reduced fit and thinning of the fabric are due to the deterioration (brittleness) of the threads of the spandex. The result is thread breakage, loss of stretchability, and eventual loss of fit.

    The deterioration of the spandex thread is caused by long-term exposure to ultraviolet rays and long-term storage under high humidity. In addition, chlorine is also prone to the deterioration of spandex. The reason for the weaker fit this time is that the chlorine in the sodium hypochlorite put in to sanitize the swimming pool accelerates the deterioration of the spandex thread.

    In swimming pools, the standard of residual chlorine concentration is set for sterilization, and it is required to keep it above a certain concentration. Therefore, the swimsuits are worn in swimming competitions and other sports often use spandex threads with high chlorine resistance. Even so, the problem of the deterioration of the spandex thread cannot be completely avoided.

    Although the deterioration of spandex cannot be avoided, we can slow it down. First, wash thoroughly with tap water after wearing, lightly dehydrate and take it home. Wash as directed by the wash symbol on the wash label as soon as you get home, then hang to dry in the shade. After thorough drying, it is important to store in a place away from high temperature and humidity. For people who go to the swimming pool frequently, it is best to prepare more than two swimsuits. What you must not do is dehydrate the swimsuit directly after coming out of the swimming pool, and then directly perform a series of operations such as placing, drying, and storage. Spandex threads in swimsuits will deteriorate rapidly due to this mishandling.