The Alpha AR Jacket from Arc'Teryx is an all-round, versatile 3L GORE-TEX® Pro jacket for climbers and alpinists. Made with lightweight N40p-X body fabric with durable N80p-X reinforcements in wear areas. With a helmet compatible hood with custom Cohaesive™ hood adjustments for ease of use with gloves or mittens so your hands can stay warm while you're adjusting your hood. Seam tape is used to improve breathability and reduce bulk and weight. Primarily for alpine, ice, expedition and rock climbing.