The Kozy Back Pack is a microwavable therapy wrap that provides non-invasive, non-pharmaceutical, first line moist heat and cold therapy.The channeled design allows for maximum heat therapy for relaxation, pain-management and relief of low back pain, Menstrual discomfort, Sciatica, Arthritis, Fibromyalgia, Backache ,muscle aches, pains and more. The Kozy Back Pack has two Velcro straps and will fit securely around the waist. Our Back Packs, Shoulder Wraps and Herbal Packs make great heating pads because of the way they are designed. By storing them in the freezer between uses, it restores the natural moisture that the microwave draws out. When heated in the microwave you have a wonderful moist heat for pain relief and stress relief. Our herb wraps herb packs and pillows are formulated with a mixture of natural seeds and herbs. Our blend has been mixed specifically to hold the heat for the longest possible time. We use all natural herbs for our herbal aromatherapy. It's soothing, not too strong and most people tell us that it smells like “sleepy time tea” The one thing we DON’T want is to overwhelm you with something that smells way too strong. The Kozy Collar products can be used hot from your microwave for moist heat, or cold from the freezer. For those with allergies or sensitivities, we offer all of our products non-scented. Providing the same soothing Hot/Cold therapy qualities as our Aroma therapy products. Fits up to a 52’’waist The Kozy Collar Back Pack has 5 Channels.