The Cocoon gives the best warmth-to-weight ratio in the ONE PLANET range without compromising on comfort, making it awesome for lightweight adventures. Bags in this series are available in three temperature ratings (-5, -8 and -11°C ISO 23537.1 limit of comfort), and small, regular and large sizes. The 10-denier Vapour Vent V2 fabric used in the shell and lining is ‘downproof by construction’, offering exceptional breathability, natural water repellency and durability. The generous mummy shape allows wriggle room, while the Vertical-V baffles and dual draft tubes keep you warm. The full-length YKK #5 locking zip opens from the foot for ventilation, while the anti-snag slider combines with our protective draft tube to stop jamming.