• Soothing deep heat for up to 12 hours with an average temperature of 50°C. • Extra wide thermal belt with 5 large thermal cells. • Heats up on its own in minutes, just open the package and place it. • Elastic fit with velcro closure, fits all sizes (S-XL). • Natural ingredients: blend of activated charcoal and iron powder. • Free of active pharmaceutical ingredients, can be stored unopened for years. • Ideal for all occasions, provides pleasant, gentle, and even heat.