I'm a HUGE fan of sun-protective clothing, so my Columbia Zero Rules long sleeve shirts have spent a lot of time off their coat hangers. I purchased both of mine over a year ago and have worn them from the extreme humidity here in Florida to oven-like 114-degree temps while carp fishing in Arizona. Not only have they done their jobs well, but they've held up great through fishing, hiking, and many wash cycles. What are the various features of these shirts?
Constructed with 100% polyester, Columbia loaded these shirts with quality and technology to keep you cool. The stretchy fabric touts Columbia's Omni Wick and Omni Freeze Zero cooling rings that are sweat-activated to improve moisture control and lower the temperature of the garment. The rings are highly-visible on the inside of the shirt, yet on the outside maintain a much lower profile. These shirts do indeed dry quickly and feel a bit cooler than average.
Along with these cooling properties, the Zero Rules long sleeve shirts are antimicrobial, offer Omni Shade UPF 30 protection, and boast clean, solid stitching and seams. These are pleasing, well-made shirts with a flattering non-baggy fit that any outdoorsman should appreciate!
Although the two colors I own appear to no longer be available, there are many other shades to choose from. Sizes in the standard long-sleeve men's lineup includes S, M, L, XL, and XXL with other Zero Rules shirt styles and sizes available as well. My shirts carry a current price of $45 each.