The Kelty Big Dipper 30 is a youth sleeping bag designed for kids aged approximately 4-12, featuring a unique expandable footbox that lengthens the bag by 12 inches to accommodate growth. It uses synthetic Cloudloft insulation, offers a mummy cut for warmth, and includes features like an anti-snag zipper and a hood for comfort. It is best for three-season camping, with a temperature rating of 30°F. Retail: $