Description These sauna rocks are offered in a variety of colors and textures, allowing you to further customize your sauna to fit your specific style/needs. Sauna rocks play a very important role for your sauna as they absorb and keep in heat. Specifications These real naturally occurring stones will help keep your sauna hot and humid. No fillers or colors added. Naturally resistant to extreme temperatures without crumbling Sourced from select rivers and beaches in Mexico, North America Rocks will not discolor, fade, or crumble Each box contains 25 lbs of sauna rocks