Designed to be warm and as light as possible, the Phantom™ 15 is a great all-around choice for colder conditions. This light, warm mummy cut bag has a snug fit and is an ideal choice if you only want one bag.

You'll throw out your current down jacket when you see this. The Mountain Hardwear Men's Ghost Whisperer Hooded Down Jacket tops the scales at 7 oz. That weighs less than the lint in my pocket. This little ditty is made of rip-stop nylon and insulated with 850-fill power goose down for the best in superlight, packable design that provides an incredible warmth to weight ratio for anyone who spends their days on the outside.

Insulated with lofty 600 fill goosedown, this roomy and comfortable semi-rectangular bag can be zipped together with another semi-rectangular bag. Unzip all the way for a comfortable, warm camping blanket.

The Mountain Hardwear Men's Ghost Whisperer Down Jacket will make you stop in your tracks. It's ultralight and super warm. Made of 7oz ripstop nylon and insulated with 850-fill down, the Men's Ghost Whisperer Down Jacket features a full-zip front and zippered handwarm pockets that double as its own stuff sack.