Up for sale is a vintage Marmot Mountain Works down mummy bag. There's no tag on it, but I believe it is either a Ground Hog or Grouse. It's 84" long x 27" wide at the shoulders, it weighs about 2 pounds, 4 oz, and it has about 3.5" of loft. I would estimate that it's warm down to around 30 degrees F without extra clothing.