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.
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