If you're sleeping outdoors, taking a backpacking trip, or traveling somewhere where you need warm and portable bedding, a sleeping bag is the perfect solution. portability. most sleeping bags are lightweight and relatively easy to carry. it doesn't take much effort to roll them and pack them up for a trip or a child's sleepover. warm and comfortable. high-quality sleeping bags are designed to keep you warm and protect you from the elements. whether you use them indoors or out, they will make you feel snug and cozy *envelope sleeping bag with a cap.