The fit and finish on this bag is first rate. It compares well with top-end bags like Feathered Friends (FF) and Western Mountaineering (WM). Shell is Pertex Microlight ripstop microfiber. Beautifully detailed. Fill level is similar to several ounces of overstuff. Warmth rating is more conservative and geared for women. Bought for my daughter and we'll be testing it soon on a ten day mountaineering trip. Stuff sack is made of same material as the sleeping bag shell, but is undersized and takes too much effort to stuff. Recommend a lightweight aftermarket stuffsack light a granite gear air compressor.