The Comfort Pac with Removable Cover provides 100% all natural aromatherapy. Our microwavable herbal pack gives hours of reusable, penetrating hot (or cold) therapy. The natural herbs & flax seed contour your body and help to relieve stress, tension, cramps and muscle discomfort. Microwave for instant heat therapy/chill for instant cold therapy. Hot or cold, our Comfort Pac can relax, rejuvenate and restore your body and soul. Features: 100% natural herbs & flax seed. Penetrating warmth. Soft, cozy fabric. Heats in microwave. Relieves stress, tension & pain. Washable cover. 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: 6.75"L x 14.5"W x 0.5"H; Weight: 1.75 lbs