The Men's Patagonia Short Sleeve Self-Guided Sun Shirt combines intuitive, on-the-water or trail performance with 40+ UPF sun protection and breezy, all-day comfort with a regular fit. Stretchy, quick-drying recycled polyester fabric moves athletically, stays cool, and looks snazzy in any situation. Featuring two vertical chest pockets with corrosion-resistant zippers to fit fly boxes, two button-closure chest pockets to keep essentials close, and a hidden tool dock under the right-chest pocket flap. The double-layer collar converts to a stand-up collar for additional sun protection, and hidden snaps at the collar points eliminate flapping in the wind. Open venting across the back and shoulders increases airflow for cooling comfort in steamy weather. The extended hem stays in place while casting, rowing, or hiking to enhance comfort and sun protection, and the shirt won't bunch or ride up when worn with hip packs. An integrated, intuitively positioned, easy-access lens cleaner is sewn in at the front hem to ensure clean optics without having to search for the lens cloth.