Royal Egyptian Beddir Heavyweight 500 Thread Count Siberian Goose Down Comforter Stripe King White 100% siberian goose down comforter. Sleep in a warm & cozy comfort with a white down comforter. Bedding features ultra-soft 500 thread count cotton fabric. Thread count is the number of threads per square inch of fabric. Higher the thread count, softer and more durable the material. Baffle box construction prevents down from shifting and ensures even warmth. White down filling has a 700 fill power. The quality of down is measured by its fill power. The higher the fill power, the lighter, fluffier, and warmer the down. Down bedding is oversized and lightweight. All seasons warmth. Hypoallergenic.