What Our Gearhead® Experts Are Saying:"This sleeping bag has everything I need for a comfortable night outdoors. The SierraLoft insulation keeps me warm even in damp conditions, and the dual zippers make it easy to adjust when I’m inside. I also love the self-sealing foot vent for instant cooling when I get too warm. It’s lightweight, durable, and perfect for backpacking or car camping."The Sierra Designs Women's Synthesis 20 Sleeping Bag is designed to ensure cozy, restful nights during your outdoor adventures. Built with lightweight, durable materials and SierraLoft™ synthetic insulation, this bag delivers reliable warmth, even in damp conditions, so you can confidently camp through 3-season weather. Its dual zipper system makes it easy to climb in and out, while the draft collar prevents chilly air from sneaking in, keeping you warm and comfortable throughout the night. When you need quick ventilation, the patented self-sealing foot vent provides instant relief, and the cinching hood locks in warmth while doubling as a pillow barrier. Finished with a durable water-repellent treatment, the Synthesis 20 is a versatile and dependable sleeping bag for any camping or backpacking trip.