The problem is that you never see it coming on the Diamond. One moment youre climbing vertical, east-facing granite at 13,000 feet. The next youre staring at heavy, dark clouds boiling over the summit from the west. Seconds later, lightning cracks. The Alpine Houdini, with improved fabric that now meets our H2No Performance Standard, has an ultralight 100% nylon ripstop shell with a DWR (durable water repellent) finish and a waterproof/breathable membrane. 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.