All of our down bedding -- both comforters and pillows -- is offered with either 700+ Fill Power Down or 850+ Fill Power Down. Both are over 90% white goose down sourced from Eastern Europe and certified under the Responsible Down Standard. Both are excellent, but for people looking for the absolute best, 850+ fill power is the way to go. If you’re struggling to choose between them, remember that larger down plumes (those higher fill power numbers) retain more heat than smaller plumes, so 850+ fill power down will provide a little extra warmth compared to the 700+ fill power.  If you like a tad bit less warmth to your comforter or are looking for a more affordable option for all-around use, choose a 700+ fill power comforter. If you want the ultimate in quality, luxury, and warmth, 850+ is the series for you.  Additionally, all of our 850+ fill down comforters and pillows are made with organic cotton shells, certified organic by the Global Organic Textile Standard. You can learn more about down fill power and fill weight on our down page, and more about how we construct our comforters on our down comforter guide.