Rash guards provide protection against UVA and UVB rays but they don't do much in the way of thermal insulation. Loss of heat in water is 20 to 25 times faster than it is in air. Even in seemingly warm water temperatures of 80 degrees Fahrenheit. This is the purpose of Aqua Sphere's Aqua Skin short sleeved men's top. The top is made of ultra-light .5 millimeter glide skin neoprene for superior flexibility and comfort. The Thermo Guard engineering is designed to conserve core body heat which allows for longer and more productive time in the water.
