Explore nature in style with the Mammut Lenni Long-Sleeve Shirt. It offers the classic look of a flannel, but is built with a lightweight and packable fabric that keeps you comfortable when hiking and stows easily on camping trips. The fabric also wicks sweat and dries quickly for cool comfort when the sun is beating down, and it sports a FreshTech treatment to limit weird odors over the course of a long weekend in the woods.