Snowsuits are designed to be used in the snow — they're fully waterproof and generally tight-fitting. A wearable sleeping bag with arms is not designed for use during activities, it's mostly aimed toward relaxing. While some of the products on this list, like the Selk'bag and Hygger wearable sleeping bags, might be able to be used for light snow activities, they're more oversized than your average snowsuit. Wearable sleeping bags are loose-fitting with plenty of room for moving around. They feature the ability to close off hands, feet, and head from the elements for sleeping. They're designed to be both a cozy place to fall asleep and a warm and mobile thing to wear around camp.