Your Shopping Bag is Empty
Have an account?
Log in to check out faster.
Your Shopping Cart
Loading...
Holiday FREE SHIPPING alert! Save now through 11/11. No code needed.
Looking for the perfect gift? Take the Quiz
Text SALE to 47871 for early access to Black Friday!
Couldn't load pickup availability
The Astroman Short Sleeve Sun Shirt is our best-selling lightweight, technical sun shirt, built with AirVent technology and offering UPF protection and movement-mirroring stretch for all your adventures.
Outdoor Research® gear is guaranteed to perform throughout the lifetime of the product.
Holiday Shipping Special: Get free standard shipping on everything from 11/1 to 11/11! Plus, we’ve extended our return window through 1/31/25 to make gifting easier. Final sale items are not eligible for return.
Named after the legendary route in Yosemite Valley, the Astroman Short Sleeve Sun Shirt features our best-selling lightweight, stretchy, and durable Astroman fabric for long days on the wall, hiking, paddling, and backpacking.
AirVent technology on the back yoke allows superb airflow and breathability, and built-in UPF 30-50+ sun protection protects skin from harmful UV rays. The Astroman's lightweight, quick-drying fabric is soft next to the skin and delivers the durability required for active outdoor pursuits.
For sunny day outdoor activities where staying shaded and cool is critical, the Astroman Short Sleeve Sun Shirt is an elite performance top.
*All sizing is based on your body measurement.We adjust the garment for intended fit and intended use.
Classic fit for comfort and ease of movement.