Product InformationThis bag is wide, warm, and packed with features. With a 3-dimensional full down collar, a full-length YKK zipper, and 5 inches of loft, the Alpinlite has quickly become one of our most popular models. Our award winning Ultralite has been a favorite among lightweight backpackers for more than a decade. The Alpinlite is just a wide version of that great bag. There are many 20 down mummy bags on the market, but none have the width, warmth, or loft of this bag. Alpinlite LZ Sleeping Bag - 7'