Having the proper paintball clothing is an asset when playing paintball for the simple fact that it protect your body from any paintballs that you may get hit with. Although it is not a necessity to play it will have more protection than normal clothing.
Some players if only playing once in awhile may not want to spend out the money to suit up in the paintball clothes for only once in awhile playing. If you are on a team and play on a regular basis you will more than likely want to purchase the proper paintball clothing.
There are different types of clothing depending on what your playing and if you are on a team or not. Woods ball players will usually dress in camo gear and will desguise themselves in many ways. Although this is a great idea it is certainly not necessary to play the sport. Many players do not want the expense of buying an outfit so they will play in whatever they are comfortable in.
You can purchase everything from neck accessories down to the shoes you wear. There are many different colors to choose from and in many cases the masks can be colored to the uniform.
Some players when playing woodsball especially will even paint their faces to blend in to their surroundings. There are many different brand names and there really is no right or wrong to what you would wear, it is basically up to the individuals taste.