There's nothing like basking in the heat of the sun, but with the Star Fire you can almost replicate that feeling throughout the night. High-loft down traps your body's heat into a mummy-shaped cocoon of warmth to efficiently use all of your energy while you recharge. A collar and anti-snag tube eliminate drafts and heat loss along the neck and zipper, maximizing retention while keeping weight down. Further shedding ounces, Pertex Quantum material is extremely lightweight for the level of durability it brings the Star Fire, and it's made from recycled materials so you can sleep soundly knowing you made a sustainable choice.