With a 650 fill-power white duck down that delivers exceptional warmth for its weight the KSB 0° sleeping bag still packs small and its durable fabric will provide years of use. Its draft collar, over-stuffed foot box, insulated mummy hood and flexible baffles at the body’s core all work together to minimize heat loss for greater thermal efficiency. Using the adjustable Length Locks the sleeping bag can reduce in length up to 15 inches, efficiently sizing down to fit a 5’ 3” person. Highly durable fabrics are tough, light and comfortable. The expanded chest area and flexible baffles provide room to move, and a stash pocket keeps small items right at hand.