A lightweight jacket that is made to be on the move - the Arc?teryx Alpha FL Jacket is ready for action and will show you just how much fun a hardshell jacket can be! It is the lightest triple-layer jacket by Arc?teryx and was designed specifically for mountaineers and alpinists. The jacket?s N40p-X Gore-Tex Pro is absolutely waterproof and breathable. Plus, it has a very small pack size. The innovative micro-seam technology makes the seams almost invisible and reduces the weight of the Alpha FL Jacket as a result of the small seam tape. What?s more, the garment is equipped with E3D patterning, which allows for enhanced mobility and conforms to the shape of your body. The slim design serves to improve the functionality of the membrane, thereby increasing the breathability. The Vislon front zip and the zip on the laminated chest pocket are very water repellent. With the StormHood hood, you?ll have the protection you need against wind and rain. Plus, your climbing helmet will fit underneath!