The mummy-shaped Flylite down sleeping bag was designed as a product to celebrate Western mountaineerings 50 year commitment to manufacture the lightest, most compressible sleeping bags in the world. The sleeping bag is a product to show the global lightweight gear community (triple crown thru hikers, trail runners, bike packers) that we have been listening and taking your feedback into consideration. The effort has resulted in the worlds lightest weight down sleeping bag that is fully baffled (i.e. no quilted/sewn through construction). The tiny micro baffles create just enough separation between the lining material and the outer shell fabric to eliminate cold spots. 10 denier fabric lining and 10 denier nylon taffeta shell fabric with C-zero DWR with the finest polish 850+ goose down and a super light #3 ykk half zipper all contribute to the impressive specifications and performance. This bag weighs just under 14 ounces ounces/395 grams in the regular length and packs down to the size of a Nalgene bottle. Lower limit rating of 36 F/ 2C.
The semirectangular Sycamore MF is made with our 1.2 ounce MicroLite XP™ to provide that extra margin in weather protection. Filled with 17 oz. of our high lofting down this bag with 5″ of loft is rated to 25° F. It sports 62″ of girth at the shoulder and 46″ at the foot. Not only will it zip to our mummy bags, but the zipper around the foot section lets it open up flat to be used as a comforter. The bag was formerly known as the “Hooded Aspen MF” and nothing about the bag has changed except its name.
Although this video to great extent review the characteristics of the two very different sleeping bags, you will after having visited a sleeping bag retailer, come to the conclusion that sleeping bag is very much a personal preference choice and definitely requires that you climb into it if you are going to be happy in the long run with its characteristics. If you only are about to go camping once, these high end bags are not to recommend and it is recommended that you pick a synthetic bag at significantly lower price. This way you will not waste you money on an expensive bag that you somewhat dislike anyway because you never evaluated it properly before purchasing it.
