The Outdoor Research Helium Rain Jacket is a packable, lightweight option to bring along on our adventure for flash storm protection. The Pertex Shield Diamond Fuse 2. 5L shell provides unmatched weather protection, blocking wind and water while keeping things breathable so we stay at the perfect temperature during our pursuit. The two zippered hand pockets stashes the small essentials we want to keep within easy reach, and the left doubles as a stuff sack for quick and easy packing.