The Outdoor Research Men's Astroman SS Sun Shirt is a Technical button up for Climbing in the sun. The nylon and spandex stretch blend is durable against the rock and stretchy for reaching this way and that. Featuring a Sun Snap Collar;, you can pop it up and secure it, so the back of your neck is protected and doesn't turn out like a lobster by day's end. Features of the Outdoor Research Men's Astroman Short Sleeve Sun Shirt Concealed snap chest pocket Ring snap closures Sun snap collar Airvent inner back yoke Fabric Details 85% Nylon, 15% Spandex stretch woven