Marmot Men's AirExchange Ultraviolet Protection Factor 50 Crew Long Sleeve T-Shirt - Agate green
From Macy's
An essential backpacking base layer that wicks sweat and keeps blazing rays at bay for quick-dry, breathable comfort. Ultraviolet Protection Factor 50 and thumbholes block out the sun with a side-zip pocket that's pack- and harness-friendly.