A Rash Guard, also known as rash vest or rashie, is a type of water wear, an athletic shirt made of Spandex and Lycra nylon. The name Rash Guard reflects the fact that the shirt protects the wearer against rashes caused by abrasion. These shirts can be worn by themselves, or under a wetsuit. The use of Lycra and Spandex create a garment that is lightweight, quick drying, flexible, durable, naturally antibacterial and water wicking. Other important components of a rash guard include flatlock stitching, and a ten panel construction. Ten panel construction versus the conventional 4 panel tee shirt construction enables the user increased mobility wet or dry. Rash Guards also offer protection from the sun (measured by its Ultraviolet Protection Factor), the Waterproof Rash Guard offer a 50% UV protection factor.