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 & flax seed Made in USA Penetrating warmth Soft, cozy fabric Heats in microwave Relieves stress, tension & pain Extra large wrap. Materials: Fabric: Polyester Fill: 100% All Natural Ingredients, including: Lavender, Valerian Root, White Willow, Chamomile, Rosemary, Peppermint, Spearmint, Hops, Yellow Dock, Lemon Grass, Cinnamon, Yarrow, Premium Flax Seed, may include other natural grains. Dimensions: 16"L x 24"W x 0.5"H; Weight: 5 lbs.