If you are going to use swimming as a means of exercising to lose weight or to maintain your current weight, what you wear should be of importance to you. Clothes that are worn in the water can be uncomfortable and they can cause difficulties for the swimmer. On the other hand, appropriate clothing enhances the experience and makes life much easier for you once you are in water.
For men, it would be much easier to just jump in there with our t-shirts and shorts but that will cause us to have the worst swimming experience ever. The best swimsuit for men is either Speedo or board shorts. Of course, Speedo is for people who rather participate in swimming competitions while board shorts are designed to be multi-functional as they dry quickly and can be worn doing any other activity whether inside or outside the pool.
For women, it is widely advisable to wear one-piece swim suit that streamlines the body and decreases the resistance. This also is for rather serious exercise sessions or contests. Women could also wear bodyskin which allows more speed and reduces drag as it is made of lycra based fabric. At any rate, stay away from Bikinis; those were not manufactured for the purpose of physical training.
Some additional accessories can be put into consideration like goggles and swimming caps. Goggles could be useful for people who are not really enthusiastic about the fact that they are getting immersed in chlorine-filled water. The better pair you buy the more comfort added to your swimming experience. Also, choose a suitable swimming cap as they make you hydrodynamic, reduce drag and fairly protect your hair.
All of the previously mentioned clothes and accessories are not ways to be a great swimmer, but still they can ease the way for you and be a great help.