Three inches of plush, hypoallergenic down alternative fill encased in pure cotton create a cozy, breathable twin-xl mattress topper from RC Willey. The down alternative fill allows you to cozy up with the soft, breathable filling that offers comfort and support without the allergens, odors or poky quills associated with down. Baffle-box construction prevents fill from shifting to ensure even loft and thick elastic anchor bands secure the fiberbed to the mattress at the corners. Get yours today!