Back Wrap Hot Cold Jobst Opaque Sensitive Polymer Skin is Bacteria Resistant Procedure Mask Ultra Pleated Polymer Skin is Bacteria Resistant and Easy to Wipe Clean Lessening the Risk of Bacterial Attachment * Flared handles and handy back release hinge allow the back to fold down flat and compact for easy storage and transport The original moist heat pack designed for use in soothing sore muscles aches and pains * Designed specifically for relief of nagging lower back pain stomach cramps and leg arm or shoulder aches and pains * Adjustable strap can be comfortably secured in various positions on the body for complete mobility * Use it hot or cold * Filled with 100% natural organic grains * 20 5 W with a 27 elastic strap attached (unstretched)