The race horse of the Alpha series, the Alpha FL jacket stands for fast and light, weighing in at a scant 11.5 ounces. While barely feeling it's presence as you tackle pitch after pitch of technical alpine terrain, you'll remember you're wearing the FL jacket when the "chance of snow" weather report quickly morphs into a real winter storm. Thanks to ultralight yet tough N40p-X GORE-TEX Pro 3L fabric, deteriorating conditions won't halt your progress and the long wearing waterproof protection and breathability ensure you stay dry no matter what. As you contour along blocky ridges working your way towards the top, cinch down the helmet compatible StormHood to keep the spindrift at bay for your final summit-slog. Keeping with the design philosophy of the FL series, Arc'teryx gave the FL Jacket a single chest pocket, decreasing bulk and maximizing breathability for high mileage days in the mountains. The Alpha FL is comfortable to wear with a harness thanks to the removable foam HemLock inserts, which hold the jacket in place when making moves above your head. Upgrade to the Alpha FL Jacket and experience the pinnacle of craftsmanship and materials in a featherweight package.