Are you into climbing, ski mountaineering, trail running, touring, ice climbing? What ever sport you are doing in the mountains a warm, breathable, water resistant layer is your best friend; its warmer than a hard shell & gives you more protection than a fleece. What I am saying is that the Flow State Jacket from Black Diamond should be your go to outdoor jacket. Made from Gore Windstopper Softshell 3 layer fabric, the PTFE membrane within the jacket is similar to the normal Gore-Tex membrane, this is what makes this fabric 100% windproof, yet also highly breathable. The stretch rib-knit polyester face fabric helps to give this jacket the flexibility you want & need when participating in active mountain sports. The Flow State Jacket provides all round wind protection & warmth on those sunny but chilly blue bird days; then when the weather turns bad it makes a great midlayer underneath your hardshell. This jacket is ridiculously versatile & you shouldnt go up the mountain without one. Tall collar Stretch panel low-profile cuffs Zip chest pocket Zip hand pocket stretch low profile cuffs