SIZE: 20.5 Inch L×12.5 Inch W×2.7 Inch H(Lower); 4 Inch H(Higher). Standard HIGH QUALITY MOLDED MEMORY FOAM BASE is covered with 100% polyester internal cover and then in a removable machine washable 100% cotton soft thick cover with zipper. 100% Polyurethane memory foam can retain its shape for continued support throughout an entire night\'s sleep VENTILATION HOLES on the inner cover for air circulation. They provide you extra comfort and a deeper, more restful sleep all night THERAPEUTIC DESIGN: Adapt to your head, neck and shoulder according to your sleep position. This provides maximum support and relief from neck pain shoulder aches and poor spinal alignment INSTRUCTION: The Fresh Foam may have some odor, it is the natural fresh smell from the memory foam and it\'s not harmful. The odor should dissipate within a few days after opening. Please do not launder the inner foam. The cover is machine washable in cold water, air dry. However, for a better purpose, we always recommend handy-wash