A casual, lifeDesign shirt with all the bells and whistles of a performance piece, the Columbia Boys's Omni-Freeze Downhaul Crew is a must have. With advanced cooling technology, Columbia Omni-Freeze works to transfer body heat to keep you significantly cooler in hot weather. The Downhaul Crew also works to Safe guard you from harmful UV rays with the Omni-Shade UPF 30 sun Safe guardion. This is the shirt to have when the mercury starts to rise.