Filled with a high quality, premium 80/20 down filled throughout the bag, the Mummy cut design helps retain body heat exactly where needed and if too warm, a long two way zipper extends down to the foot section.   For comfort, the anatomic hood design sits perfectly against the head and a drawcord can be pulled if required for snug comfort.  Vaude have finished the material, making it wonderfully soft, durable and easy to care for, making the Cheyenne ideal for trekking and camping tours as it can be stored into a compression packsack when not in use. With the Responsible Down Standard (RDS) , VAUDE ensures that the down or feathers used in our products come exclusively from geese, ducks or other waterbirds that have been treated in accordance with animal-welfare standards. Practices such as live plucking and foie gras production are expressly excluded.RDS is a certification from the independent Textile Exchange organisation that allows us the seamless tracing of down and feathers along the entire supply chain. VAUDE products bearing the Eco Finish been waterproofed in an environmentally-friendly way without fluorocarbons (PFC). PFCs are part of a group of chemical compounds which are used to waterproof the outer layer of many outdoor products. They have come under criticism for being non-biodegradable, bioaccumulative and toxic, and suspected of being harmful to health. VAUDE has made a clear commitment to completely renouncing PFCs.