Seventy percent of people sleep on their side, but mummy bags are not designed to accommodate this. With a unique Spoon shape, adding room at the elbows and knees, the Viola is a three-season synthetic womens backpacking bag that is designed for side sleepers, and allows you to shift positions throughout the night. The Viola has some of NEMOs most popular features, including Thermo Gills that help regulate temperature during the night and Blanket Fold which provides tucked-in comfort. With an included cinch sack, the Viola packs down nice and tight for all your adventures. Zip together with the Men's Forte for a double bag.