We offer four different sizes of heat packs to accommodate different areas of your body. The pack is designed to go all the way up to 54°C at peak, 44°C average between 30 minutes to 1.5 hours. After the usage, please boil the pack in water for 5 - 10 minutes to melt down crystals inside the pack, after cool down, it’s ready to use for more than 1000 times, or 4.5 years.
To ensure best heat experience, we’ve been manufacturing the pack with premium plastic which will not melt into your pot. Liquid inside is non-toxic ingredient called sodium-acetate, which has been used as flavor enhancer among food industry since 1978.