The Sea to Summit Latitude Sleeping Bag is their most versatile bag yet, designed with a tapered rectangular shape to suit a broad range of activities and environments and a wide range of temperatures. It is filled with 750+ Loft ULTRA-DRY Down and protected by Sea to Summit's 2D NanoShell fabric. By utilizing lightweight shell fabrics and high loft ULTRA-DRY Down, Sea to Summit has created the Lt II, a bag that is similar in weight to their traditional mummy bags, while offering additional internal wriggle room for increased comfort. The technical tapered rectangular shape is cut with a larger hood, broader shoulders, large chest area and a wider foot box to provide an extremely comfortable sleeping bag while maintaining thermal efficiency. The addition of a full length side and foot zip allow for conversion from a warm winter bag to a duvet/comforter, offering the greatest versatility in a cold weather sleeping bag. Features: Full