Mrs. RJ discovered this option at Costco today. $14.99 for two. Long sleeve, crew neck, UPF 40, 92% nylon, 8% spandex. I wear a size L these days, and they are a nice comfortable fit for me (package says L = 42-44).
I have several of these "32 Deg Cool" T-shirts in shortsleeve in Black, and really like them. This fabric is an even lighter mesh, and feels very cool.
Best of all, they are in tribal p-f ORANGE