ExOfficio Sol Cool Crew - Long-Sleeve - Men's - $59.95

If you can only make room for one long-sleeved tee on the next near-water adventure, then you'd be crazy not to include the ExOfficio Men's Sol Cool Crew. The lightweight, stretchy Sol Cool material offers incredible moisture management, while a UPF-50 rating means you won't suffer through extreme sun exposure on a multi-day boat ride up the Amazon. - $59.95