Premium futon mattress, single 8-piece set, French down Excel Gold Label duvet, extra thick and voluminous type Made with 90% high-quality French down France is located further north than the northernmost point of Japan, at 45° north latitude. Waterfowl raised in this harsh cold climate retain high-quality down to withstand the cold. We use white duck down from France, which has good breeding conditions and is highly regarded as a quality producer of feathers. Only products that pass strict European inspections are shipped, and French down is of very high quality.