The Men's KUHL Driftr Long Sleeve Button Up Shirt is an ultralight shirt for warm-weather hiking. Start below the treeline, move above it, and enjoy all areas of the mountain with a shirt that offers UV protection and keeps you cool when exploring under the summer sun. The nylon fabric wicks sweat, dries fast, and has built-in odor resistance, allowing you to head to the pub for a bite after returning from the summit.