The Sleeping Bag Blanket is the perfect solution for chilly nights spent outdoors. Whether you're car camping, picnicking, or at a music festival, this blanket will keep you warm and dry. The shell is made of water repellent ripstop nylon, while the lining is 100% fast drying polyester microfleece. The result is a soft, cozy blanket that's also durable and easy to care for. The Microfleece Blanket / Sleeping Bag can also be used as a fleece blanket when unzipped. It also zips to all other rectangular Cocoon models with a zipper to make a sleeping bag for two (Cocoon TravelSleepSystem)