Heat Factory gets warmer. Heat bags for the toes. Open the package and as soon as oxygen is added they warm up. To be placed in the shoe. There are two bags in the packaging. These give off heat for up to 6 hours.
The Heat Factory Bodywarmer consists of an odorless breathable bag that is filled with a biodegradable mixture of iron powder, charcoal, salt and vermiculite (made from mica ore).
Unopened, the Heat Factory product can be stored for about 3 years. Once activated, the process can be stopped (for up to 7 days) by closing the sachet in an airtight container.
The Heat Factory products are manufactured in America and are so safe that they are even used for all kinds of medical applications, where targeted heat is required, and have been around for more than 30 years!