Great for lots of things in the sun! I have several and keep warm in a cotton t-shirt. However, there are great long-sleeved shirts for spring and autumn. I would buy a size larger than normal if you want it to be loose to allow for ventilation. EVERYONE will find that the sleeves are too long. I think that's written in a lot of the comments.
Van Heusen Traveler Stretch Men's Shirt
47 Review
Gildan Performance Men's π Clothing and Shirts with Moisture-Wicking Polyester
44 Review
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
π Nantersan Placket Raglan Tee - A Casual Must-Have
52 Review