This lightweight mountain sports jacket by Montane is specially designed for trail running and mountain hiking where speed and light weight are vital aspects. The Spine Jacket is made of breathable Gore-Tex Active Shell with a 23,000 mm water column. This trail jacket is designed to get by with as few seams as possible. That way, weak points were minimized from the start and the weight was significantly reduced. The Spine Jacket is excellent for use as an outer layer in a functional multi layer system. A thin or medium layer can easily be worn underneath the Spine Jacket for insulation. The special trail hood with laminated peak fits tightly over your head and can be combined with a beanie or headband perfectly. Minimalistic armpit zips and a full length front zip regulate ventilation when its getting sweaty during your tour. Thanks to its elasticated back, the Spine Jacket by Montane guarantees all trail runners total range of motion and maximum performance.