242849-0610-XL - Designed in conjunction with legendary big-wall climber, Hans Florine, the Outdoor Research Men's Astroman Shirt uses a lightweight nylon and spandex fabric for optimized climbing comfort. This button-down shirt wicks moisture, withstands abuse, and easily stretches when you're climbing all day. A fold-up collar blocks sun rays from cooking your exposed neck, and the shirt's UPF 50 + rating ensures upper-body sun protection. 727602430331