The Positron Pro hooded jacket is designed to protect you and keep you comfortably warm in freezing conditions at altitude. This ultra-warm down jacket is filled with down.inflating power800 cubic inches of space in a compartmentalized design that eliminates cold spots, minimizes clutter, and maximizes freedom of movement thanks to tight partitioning positioned in strategic locations. Features a durable snow-resistant fabric.Pertex® Quantum Pro, it easily withstands the external conditions that can be encountered at 6,000 m during dizzying ascents in snowstorms.