The problem is that you never see it coming on the Diamond. One moment you're climbing dauntingly steep granite at 13,000 feet. The next you're staring at sinister clouds roiling over the summit. Seconds later, lightning cracks. The Alpine Houdini® keeps you dry with an H2No® Performance Standard fabric that combines a waterproof membrane, an ultralight 100% nylon ripstop shell and a DWR (durable water repellent) finish. It's emergency rainwear for climbing that also blocks wind and traps your heat on chilly belay ledges, packs into a single chest pocket (now on the exterior of the jacket, with clip-in loop), and seals up with elastic wrist cuffs and a single-pull drawcord waist. With helmet-compatible, single-pull adjustable hood.