Magic Hot Pad-Pain Relief, Instant Reusable Heat Pad (SW-12) Size: 7"x5" Color: Green/ Comes with a waist support Magic Hot pads are practical and useful in every day life. All you need to do is to flick the metal inside and there we go with instant warmth!Hot pack gives instant heat up and can be reused over and over again. It could be used outdoor for physiotherapy, it works especially effective on muscle aching, back aching,neck Pain cramps, arthritis pain, and etc Magic pad accelerate blood circulation, eliminate blood clots, improve the supportive tissue, and speed up the metabolism and result in vigorous blood;They are safe and non-toxic containing food grade substances. Visit AA Health Device Store @ www.amazon.com/shops/A2KZKZJMRUA53T