Hotteeze Heat Pads are made in Japan and the contents are biodegradable - unlike most brands, you can open the pack and put into the garden as compost! Hotteeze stay hot for more than 14 hours. Use Hotteeze to comfort tired muscles, on your tummy for period pain or take them anywhere you need to stay warm for hours. Up to 14 hours of heat. Made in Japan quality, endorsed by the Australian Physiotherapy Association.