These SF made body packs are handmade with high quality rice, flax seeds & herbs. Available in pretty fabric in assorted patterns & colours. Place in microwave for 1-2 minutes and let the penetrating heat loosen and ease tight knots and sore muscles. May also help alleviate menstrual cramps and arthritis. Store in the freezer for an excellent cold pack great for reducing swelling and easing migraine headaches. Great for athletes and people with arthritis. The filling is sewn into pockets to give you a constant, equal heating.