Linen Hot + Cold Therapy Pillow allows you to enjoy the healing benefits of an all-natural heated or cooled therapeutic tool. Heat it to soothe and relax tension in your neck, shoulders, or any muscle group. Freeze or refrigerate it to use as a cold compress. A welcome relief for sore muscles, cramps, or night sweats with the addition of lavender to enhance your relaxation experience. Linen is a highly durable, hypoallergenic, breathable natural fibre made from the stalk of the flax plant, making it the perfect fabric for this highly eco-functional therapy tool.