The uniquely designed Mattress Barrier Cover shields your mattress and foundation from harmful exposure to bacteria, mold, and dust mites. The organic cotton cloth is woven so tightly that allergens cannot penetrate it. A durable brass zipper attached to the soft fabric allows for convenient removal for machine-washing. Available in depths of 8 to 16 inches. Brass zipper extends two thirds around the perimeter for easy removal. Fully machine washable and dryable. The soft organic cotton fabric is more comfortable than other barrier cloths. Pillow Barrier Covers are also available. All Barrier Covers have a Thread Count of 250.