Zippered Cover included with Cal-King 4 Inch Soft Sleeper 5.5 Visco Elastic Memory Foam Mattress Topper USA Made Brand: Soft Sleeper Visco Elastic Memory Foam Type: Foam Mattresses Thickness: 4 Bed Size: California King Comfort: Soft Cushioning Material: Polyurethane Foam Tailoring: Pillow Top