Champ Heat patch back

This XXL heat patch for the back provides good relief for muscle pain,
stiff joints, back pain, menstrual pain, strains and sprains.
The heat patches are easy to use and keep the heat for up to 8 hours!
A heat patch that heats by itself is made of iron powder, activated charcoal and water.
The iron powder ensures that the plasters become warm.
Heat patches give off thermal heat.
They are designed to provide enough oxygen to the heat elements.
So you have a constant heat for several hours.