With classic style and built in performance, the ExOfficio GeoTrekr Shirt is perfect for hiking or urban adventures. Durable, breathable nylon ripstop fabric wicks moisture, dries quickly, ventilates, and protects you from the sun. . . . . . Durable, lightweight nylon ripstop fabric. Breathable, moisture wicking, and quick drying . Mesh lined back yoke ventilation. Sun Guard 30 for protection from harmful UV rays. Hidden button down collar. One security zip pocket at left chest. One front drop in chest pocket on right. Knife pleats at back for better mobility. Floating pocket loop in left front pocket. Shirttail hem. Natural fit: Closer fit to the body through the chest and tapering to the hem, with careful attention to maintaining mobility and reach. . Machine wash cold Wash with like colors No bleach or fabric softeners Tumble dry low Iron low delicate setting. .