BE PREPARED FOR THE UNPREDICTABLE WITH THE ARC'TERYX ZETA SL JACKET. With this jacket, you'll be good to go on your summer hikes when the unpredictable weather hits. Designed to be used as an emergency shell while hiking, the Arc'teryx Zeta SL Jacket packs up so small, you'll forget it's even there until the bad weather arrives. The Gore-Tex fabric locks out the wet weather, while the articulated design allows you to move the way you need to. Cinch up the hood and hem for extra protection from the storm. FEATURESSuperlight jacket provides wet weather protection while backpackingGore-Tex Paclite Plus is waterproof, breathable, and packableTrim, articulated fit ensures freedom of movementAdjustments at hood, hem, and cuffs ensure a secure fit