Swimming is a playful sport as well as a fitness exercise. If it is just play you do, then any fashion swimsuit should be good. However, if you are serious swimmer and consider it as a fitness regime for keeping in shape, then you need to pay more attention to what type of swimsuit you wear. Workout swimsuits are specifically made for this purpose.
A workout swimsuit will maximize your speed in water and improve your glide time. This will reduce the drag and increase water flow for a smooth swim. Additionally, choice of a good swimsuit also helps you feel comfortable during your swimming and definitely stands up well to the deterioration of chlorinated water. Most suits now come in the durable versions of nylon and spandex. The fit of the suit should be snug but not tight. This will keep the suit in place during forceful movements and not pinch, bend or ride up during the swim.
Swimmers opt for either suit separates or a single suit style. The one-piece comes with moderately cut leg openings, high necks and backs or a racer style V, Y or X back. This gives a more secure fit and provides freedom of movement. It also provides better coverage and support. Some workout swimsuits also come with a high zipper back for the critical hydrodynamic fit. Also consider workout swimsuits with front lining, as a suit with lining will generally last longer. It also holds the shape and color better than an unlined suit.
Finally, how do you know its time to replace your swimsuit? When you suit starts to bag or feels loose it is time to replace it.