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The Canon™ -40 allows for temperature regulation, improving your sleep under a wider range of conditions. No other mountaineering bag offers the same comfort from base camp to summit.

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Adjustable Thermo Gillsâ„¢ vent body heat at your core without letting cold air rush in.
Contrast color Arm zips open from the inside and outside of the bag.
The Stove Pipeâ„¢ Tunnel Hood, insulated with PrimaLoft, keeps a pocket of warm air near your face so breathing is comfortable in the bitter cold.
Zippered arm openings (Arm ZIps) and a central zipper location let you enjoy the comfort and warmth of Canon -40 while eating a meal or prepping gear.
Images from the thermal image camera show the Thermal Gillsâ„¢ in action. Opening the zippers on the outside of the bag allows heat to escape without allowing cold drafts.
NEMO testing trip. Franconia, New Hampshire.
The entire exterior of Canonâ„¢ -40 is constructed from OSMOâ„¢ DT waterproof/breathable fabric to protect you and your down from frost and moisture build-up.
Unique Toester Boxâ„¢ construction reduces cold spots.
Canon -40 is filled with premium 850 fill power down. These down clusters trap layers of air for natural insulation while high loft ensures warmth and compressibility.