This shirt was designed to meet three criteria: (1) Create an all-natural alternative to synthetic performance tops (2) that wears like your favorite, well-worn everyday shirt and (3) can be worn repeatedly without the need for washing, even through back-to-back-to-back high yield days. Our Runpaca fabric blends ultra-soft cotton—that feels immediately broken-in—with thermally regulating alpaca fleece—that repels water and resists odors requiring less washing than typical tees. Yes the 2.5% alpaca fleece content, woven throughout the fabric fiber, really does make a noticeable difference in resisting sweaty odors and in the overall performance capabilities, making our range of Runpaca Tops our go-to's for active travel.