This is a very well built sleeping bag. Zippers, velcro tabs, drawstrings, flannel, insulation, etc. The nylon duffle might not last forever. It takes some effort to get this bulky, extra-insulated sleeping bag into the duffle. But man is it toasty. I bought it primarily for my wife who gets cold while camping. That won't be an issue ever again. I get quite warm but it's fine with my side unzipped. Very soft and comfortable.