This dry shirt will keep you warmer and more comfortable than any other performance shirt available. Nano-technology allows sweat to migrate through the material while keeping out most precipitation on cold or wet days. This gear allows you to keep your mind off your gear and your head in the game. You simply must see this product in action to fully appreciate its properties. On top of your wetsuit or just to protect against the sun, it will also keep you warm. You can also wear it to hang out on the beach as it is a non fitted shirt (usually the case with a rash guard).