Innovative back cushion comes with reusable Hot/Cold Pack insert for the ultimate support as well as soothing, healing comfort Contoured back cushion is made of foam, great for everyday use and can be used without the Hot/Cold Pack Hot/Cold Pack can be used in microwave to heat and freezer to cool Comes with adjustable strap to secure the cushion to a chair or car seat Cover is zipper removable and washable Material: Polyester, Color: Black Dimensions: 14w x 13h We love the Back Cushion with Hot/Cold Pack because it takes your back to a new level of soothing and healing. The innovative design has an insert pocket ideally situated to your lower back for cold or hot therapy. Just a point of caution … sitting with a big smile on your face may be contagious.