These are the clothes worn in medical facilities globally and they can come in a variety of styles and patterns these days.
In past, these uniforms were plainer so to speak. They would come in a few various color choices, but not many. It seemed like everywhere you saw everyone had the same scrubs on. Now you will see these with varying colors, some can be very fun and funky even. They come with many patterns and designs as well.
If you have ever been in a children's room of a hospital or pediatrician's office you may saw the room staff with cartoon characters and such. Doctors also wear these as well although theirs always seem to be blue.
Some hospitals actually provide their workers with these uniforms. They might have been a specific color or have the department logo on the uniform. Other people prefer to buy their own. They also come in a variety of sizes, including various plus size scrubs for those who need them.
Regardless of if you buy your own medical scrubs or the medical department in which you work to provide them for you, they are an easy uniform. You can clean them without fear of them paling or color washing away. The material is lightweight as well. If you need more info have a look around online or try to find a medical store in your area.