The men's Atmosphere Short Sleeve is the lightest shirt in Brooks’ lineup to keep you cool when the weather heats up. Brooks constructed the Atmosphere from its ultralight DriLayer fabric. The fabric is made of 88 percent recycled material, but it doesn’t lack in performance: It soaks up sweat and dries out in a flash. Finished with bonded seams for complete comfort and enhanced with an anti-microbial finish to ward off stink, the men's Brooks Atmosphere Short Sleeve will become your go-to warm weather layer.