Many sports have their own sets of costumes relative to how they are useful on the playing field or their respective venues. Most indoor games require less padding or have to have light uniforms for maneuverability and comfort. Easy to use and light stuff helps the playing of any game on the amateur or pro level.
Many sports remain on the amateur level, but it may have leagues for collegiate play and they could also go up to the Olympics, which remains a venue for amateurs for many games. Graeco Roman wrestlers have need of things like wrestling singlets. Unlike other martial arts, this is considered a less violent but no less strenuous one.
Thus the wrestlers playing here may not need to have body padding or gloves. They need their arms and legs free all of the time and their type of uniform was developed from ancient Greek and Roman costumes. Mostly, these were abbreviated forms, and the singlet evolved from these while today it also is far different from its ancient predecessors.
The singlet is called that way because it is a one piece object, donned to cover all the necessary parts. It is abbreviated, as said, and is usually made of a durable and stretchable fabric to keep it from tearing. The singlet undergoes a lot of stress or pressure when in use for games on the mats and above ground.
Usually, wrestlers could go down on mats and do all kinds of holds and chokes there. The play seems static, but in actual fact the players or athletes are maneuvering in a refined and skilled manner. There is brute strength involved, and no singlet is tasked to be comfy while liable to tear apart during the most titanic struggles.
There are specific sports manufacturers that make it, and some could be the most iconic brands. Of course, it is an exclusive sporting line, and not many of the athletes here are famous like basketball stars are. However, they do need excellent clothing and while before their uniforms were made by relatively unknown companies, today famous ones are providing them with uniforms.
The fact is that all sorts of famous companies are improving their services for their consumers. And the item here is not something that could be useful for normal wear. Before or after an event, the athletes may take off their clothing for civilian clothes, because the singlet is more or less comparable to the monokini for females.
The thing is respectable enough though and all plays here are never malicious. The refs, the audience and the enthusiasts all know what the game is all about. The athletes themselves do not consider their mode of dress something to be worried about, and there concern is usually for those which are strong and tough.
Toughness is provided by a number of synthetic fabrics which were developed specifically for sporting use. These are thicker and stronger than usual, since it needs to contain the bodies of players. More often than not, there are decals, logos and designs on it.