The no-nonsense Slumberjack Grand Lake 20F Deluxe Sleeping Bag is entirely designed with comfort in mind, featuring a cozy and breathable cotton flannel liner that makes sleeping outdoors feel like home. A soft but rugged twill shell paired with robust filling keeps you warm when temperatures plummet. Plus, it's oversized so you can stretch out for a good night's sleep. Need a blanket instead? The Grand Lake fully unzips for multi-use as a comforter.