Sonic™ Down Mummy Sleeping Bag

Took this out in single-digit temps and the draft collar plus hood cinch kept every bit of warmth locked in, even when the wind picked up. The temperature range is no joke—I unzipped it halfway at 35°F and was perfectly comfortable. It's lighter than my old bag by a good margin, which makes the moun

Backed up the claim about the temperature range on a single-digit night in the alpine, and the draft collar sealed everything in so well I actually had to unzip the foot vent by morning. The 40°F end is a stretch for me, but from 20°F down it's dead-on.

The draft collar cinched down without any gaps, so even at 15°F I wasn't fishing for a hood opening in the dark. The draft collar really locks in heat when I move around at night.