Marmot CWM Sleeping Bag

The -40°F rating is an EN/ISO survival rating, meaning it is designed to keep you alive in extreme conditions rather than ensure a comfortable night's sleep. If you are sleeping in temperatures approaching this limit, you should pair the bag with a high-R-value sleeping pad and appropriate base layers.

The center zipper is designed for efficiency, allowing you to sit up and exit the bag quickly without needing to fumble with side zippers. It is particularly useful in cramped tent spaces or when wearing bulky expedition gear.

Yes, the Pertex Shield shell is both waterproof and windproof, making it highly effective at shedding moisture and protecting the down insulation from condensation or spindrift that might accumulate inside your tent.

The Marmot CWM is designed for a maximum user height of 72 inches, or 6 feet. If you are right at that limit, you may find the fit snug, especially if you plan to wear extra layers inside the bag.

The CWM features a multi-baffle, wraparound footbox specifically engineered to prevent cold spots at the feet, which is often the first area to lose heat in sub-zero temperatures. This construction keeps the down lofted around your feet rather than compressing it.

Absolutely. The internal draft collar acts as a seal around your neck and shoulders, preventing the warm air you generate from escaping the bag every time you move. It is a critical feature for maintaining core temperature in freezing environments.