The Constance 233 thread count white duck down blanket is inspired by the classic down filled blanket you know and love while being lightweight for daily use. The cotton cover offers a breathable, cozy fabric that will last for seasons to come. Filled with 600 fill power, 75% white duck down and 25% white duck feather for a timeless comfort and warmth. Natural fill is washed with Oxipower technology that exceeds the industry standard for cleaning natural fill contents. We wash our material 18 separate times to ensure a complete disinfected and hypoallergenic fill which is responsible down standard certified.