What Our Gearhead(R) Experts Are Saying:"This is the top I reach for when it's blazing hot and I'm moving fast. The Astroman Air Sun Tank is insanely breathable with perforated panels right where you need them, and the back cinch lets me dial in the fit whether I'm layering or going minimal."Long summer days in the mountains call for gear that keeps pace with the heat. The Outdoor Research Astroman Air Sun Tank is made for high-output movement under the sun, combining lightweight performance fabric with thoughtful ventilation and UPF 30+ protection. Whether we're cruising trails or logging mileage at the crag, this tank keeps us cool, dry, and protected. Designed with laser-perforated panels for airflow and a tall collar for extra sun coverage, the Astroman Air Sun Tank goes beyond the basics. A back cinch lets us fine-tune the fit, while the stretchy, quick-drying fabric wicks moisture and moves with us all day. It's the kind of tank we forget we're wearing-until we realize how well it performed.