Every DEWOOLFSON® mattress "topper" is filled with a blend of 50% white goose down and 50% small white goose feathers of all-European origin. This topper is lighter, softer, and cozier than our original full-support featherbed (now available in-store only) and can be used under your existing fitted sheet or with a protective cover. It also makes a natural, breathable topper over a memory foam mattress. Constructed in a baffled-box pattern from 100% cotton twill fabric that was engineered in Germany and woven for years of durability and strength. Oversized to perfectly fit your mattress, in queen or king size only.