The Mammut Perform Fiber 20 Sleeping Bag is a lightweight and compressible mummy bag designed for 3-season backpacking. The synthetic Insulation is rated to 20AdegF/-7AdegC and provides reliable warmth that's much more resilient than down in wet or humid environments. Features like a quiet 2-way center zip, magnetic collar closure, and noise-minimizing hood design serve to make your nighttime in the backcountry more comfortable and relaxing. Features of the Mammut Perform Fiber 20 Sleeping Bag Restorative sleep thanks to a newly developed sleeping bag shape Intuitive climate regulation with a central 2-way zipper Comfortable, soft material in the hood reduces noise and increases comfort Including deep sleep mask and earplugs to reduce light and noises PFC-free DWR treatment Lining made from 100% recycled polyester Easy-to-use magnetic closure on the Insulation collar Improved YKK zipper prevents jamming of material Insulated covering along the zipper to protect from cold bridges and enhance climate comfort Insulation chamber around the hood opening to protect from cold and wind Internal pocket to store valuables Drawstring for easy adjustment of the hood and Insulation collar Revised anatomical foot box for greater comfort without extra weight Zipper garage reduces cold Areas at the end of the zipper Supplied with a packing bag