"What Our Gearhead® Experts Are Saying:""I wear the Astroman Short-Sleeve Sun Shirt on hot days when I need protection without overheating. It’s breathable, stretchy, and the hidden snaps make it super easy to throw on or vent while hiking. The relaxed fit is a nice update—it feels way less restrictive than older versions.""When we’re spending long days on the trail, at the crag, or deep in the desert, we count on the Outdoor Research Astroman Short-Sleeve Sun Shirt to keep us cool and protected. This lightweight tech shirt is our go-to for breathable comfort under the sun, with UPF 30+ protection and quick-drying performance in a relaxed, movement-friendly fit. Bluesign®-approved recycled materials and stretch-infused fabric allow us to move freely, while thoughtful details like the hidden snap front, drop-in chest pocket, and updated back yoke keep it functional and clean. It’s a shirt that does everything—hike, climb, and travel—without missing a beat."

Key Specifications