Rash guards are tight-fitting shirts made from stretchy materials like nylon or spandex. They are designed to protect the skin from rashes caused by friction, sun exposure, and harmful UV rays. Commonly used in water sports such as surfing, swimming, and paddleboarding, rash guards help keep the skin safe while providing comfort and flexibility. These garments come in various styles, including short-sleeve and long-sleeve options, and are often worn by athletes and outdoor enthusiasts. Rash guards can also be used in activities like martial arts and yoga, where they help prevent skin irritation during physical contact or movement.