When the mountain shows its teeth, this is the shell you want. The Alpha SV Jacket is built to endure relentlessly severe conditions, committing ascents, and sustained exposure in the world's harshest alpine terrain. Constructed with burly 100D GORE-TEX PRO ePE, this shell delivers unwavering waterproof-breathable performance and confidence-inspiring protection that will keep you climbing-even when the mountain is at its worst.