Nylon Imported Equipped with an Expander Panel System that offers 5 to 10 inches of extra space; when not in use, it acts as an extra thick zip baffle to keep out drafts Comfort temperature rating is 47 degrees Fahrenheit, low rating is 36 degrees Fahrenheit; insulated with Softie filling to keep you warm Features a Reflectatherm metalized barrier to keep you warm by reflecting heat back into the sleeping bag Designed with durable Paratex lightweight fabric; completely windproof, water repellent, moisture wicking, and breathable Includes a compression stuff sack for compact, convenient travel; packed size is 9 inches by 6 inches