Here's what other sites are saying:
Hot, humid fishing trips and sweltering hikes are no match for the Columbia Men's Zero Rules Shirt. This long-sleeve shirt uses Omni-Freeze Zero fabric for sweat-activated cooling that keeps you comfortable on the hottest of summer days. The shirt's Omni-Shade UPF 30 treatment shields your upper body from the sun, and the antimicrobial treatment keeps this shirt from stinking when you wear it for long hours.
You might suddenly feel like a rebel in the Zero Rules long sleeve shirt. Featuring Omni-Freeze(TM) Zero technology to keep you cool on the hottest days, you'll feel like you can do anything.
Columbia Men's Men's Zero Rules Long Sleeve Shirt - Big Men's Zero Rules Long Sleeve Shirt - Big
Columbia PFG Zero Rules Long Sleeve Shirt
$29 - $45
Columbia Cool Catch Zero Long Sleeve Shirt
Columbia Freeze Degree Long Sleeve Shirt
Columbia Insect Blocker Long Sleeve Shirt
Ibex Shak Jersey
$100 - $123
Asics FujiTrail Hoodie
Ibex Hooded Indie
$78 - $120
ExOfficio Sol Cool Crew Long Sleeve Shirt
$33 - $60