Western MountaineeringMityLite Sleeping Bag Moss Green 6FT 3IN

This bag is awesome! I had mine overfilled and have slept several nights in the 20's and 30's and never felt chilled, slept like a rock. So, ya, conservatively rated at 40 degrees. I'm fortunate to own several Western Mountaineering bags and I can't pick a favorite because they all are extremely impressive works of craftsmanship made with the very best materials in the world. Some people collect salt and pepper shakers, I collect WM sleeping bags. I camp 12 months a year in the high country of Colorado and Wyoming. These bags have never let me down.The MityLite easily stuffs in its sack and lofts immediately when you pull it out. Really freegin' nice!Update: Slept comfortably at 3 degrees Fahrenheit with 400gr base layer, down pants and light down jacket with down balaclava.