Bringing comfort with knowledge, Smithsonian Sleep Collection is your choice when it comes to the science of sleep.Total 4 inches thickness of support instantly enhance your mattress.Soft white goose down blend pillow top adds a layer of luxury and pressure relief.Filled with specially engineered white feathers and high resiliency fiber blend that provides excellent support.Durable 100% cotton feather and down proof fabric.Bringing comfort with knowledge, Smithsonian Sleep Collection is your best choice when it comes to the science of sleep. Once considered as luxury sleep items for the wealthy, the feather beds originated in northern Europe as early as the 14th century. A well-made feather bed provides both support and softness. Smithsonian Sleep Collection feather beds incorporate the traditional fine natural materials with up-to-date technologies. The result is enhanced comfort proven by history and easy housekeeping properties that fit modern lifestyle.