A rash guard, is a nylon or polyester made water sports wear and are also called Rashies. Rash guards are used as light body coverage in warm to extreme hot temperatures and are most often worn in surfing when the weather is too warm for a wetsuit. As the name suggests they help prevent wax-based chafing from sliding on and off of the surf board. It also gives protection to the torso from being rubbed against the sand stuck onto the wax. Rash guards also offer some protection from the sun's ultraviolet rays, against jelly fish stings, and irritation caused by rapid impact with surface water and waves as well.