"Men's Brooks® Atmosphere Long Sleeve 3.0: When the sun is out and the miles are long, the Brooks Atmosphere Long Sleeve 3.0 is the men's running top that keeps you moving comfortably. Built around Brooks' GO2™ fabric, this lightweight long sleeve wicks sweat fast - drying in under 7 minutes - so you stay comfortable on warm-weather runs without that heavy, clingy feeling. UPF 40+ protection shields your skin from the sun, making it a smart choice for outdoor training when you'd rather cover up than lather up.The GO2™ fabric construction uses a blend of recycled polyester and spandex (91% recycled polyester/9% spandex in Shell 1; 87% recycled polyester/13% spandex in Shell 2) that feels smooth and soft against the skin with enough stretch to move naturally with your stride. A semi-fitted cut keeps things streamlined without feeling restrictive, and thumbholes help the sleeves stay in place when you're pushing the pace or layering up on cooler mornings. The antimicrobial finish works to prevent odor-causing bacteria from building up in the fabric, so this top stays fresh across back-to-back training days. A secondary performance fabric panel adds both visual interest and technical function.Why Our Fit Experts Love It""I reached for this top on a sunny long run day when I wanted arm coverage but didn't want to overheat. The fabric dried out so fast I barely noticed I was sweating, and the thumbholes kept everything in place the whole time. It's the kind of shirt you forget you're wearing - which is exactly what you want on a long effort."" - Sean, Road Runner Sports Fit Expert, Chula Vista, CAWho It's Best ForThe Brooks Atmosphere Long Sleeve 3.0 is a strong pick for men who run or train outdoors in warm or sunny conditions and want sun protection without sacrificing breathability. If you prefer long sleeve coverage on hot days, hate the feeling of a sweat-soaked shirt, or want a lightweight layer that works for both solo runs and group workouts, this top fits the bill. It also works well as a light base layer when temperatures are in flux. VIP Family members can take the Atmosphere Long Sleeve 3.0 for a 90-Day test drive with our Perfect Fit Guarantee."