Welded, fully waterproof and breathable. This jacket will be great for all your wet weather needs, and durable enough for your Mountain Adventure. The Pinnacle Jacket represents the next evolution of Mountain Hardwear's 9 years of innovation in sew-free technology. It is a technical hardshell capable of the most demanding pursuits, made with patented zWeld Seam technology. Each year Mountain Hardwear has pushed the envelope of welded seam technology and its application and the Pinnacle Jacket is our latest step waterproof/breathable construction without sewing and without the need for seam tape on major seams.