The Arc'teryx Zeta SL Jacket provides Gore-Tex waterproof, breathable protection that keeps you dry in rainy weather, and then also easily packs away whenever the wet weather dissipates on the trail. With Paclite Plus technology, this jacket's Gore-Tex membrane is far more packable than most Gore-Tex hardshells. It has a weight-saving trim fit with articulated patterning that ensures freedom of movement while hiking. There are adjustments at the hood, hem, and cuffs to ensure secure coverage from the storm.