Equate Large Hot Cold Compress. Ideal for back lower back hips shoulder and full coverage on a knee. Retains therapeutic temperature for up to 3 hours. Reusable hypoallergenic and washable. Compression adjustable one-size-fits-all. Not made with natural rubber latex. Non-toxic microwave safe washable flexible when frozen. Adjustable straps up to 50 inches. Carefully read all instructions and warnings located on gel pack before use.