Our microwavable herbal Back Wrap gives hours of reusable, penetrating hot (or cold) therapy. Filled with 12 healing herbs and flax seed, the extra large Back Wrap covers shoulders to lower back. Microwave for instant heat therapy or chill for instant cold therapy. Hot or cold the Back Wrap can relax, rejuvenate and restore your body and soul. Features: 100% natural herbs Weight: 5 lbs.