Activated clay is a valid alternative to silica gel.
The clay, also called Bentonite, is a product of total natural origin. It is extracted directly from the ground, is completely dried in the oven and then ground and reduced into granules.
Activated clay is a particularly porous and hygroscopic material that is a valid alternative to the more expensive silicagel. Activated clay has excellent moisture absorption properties and is an absolutely natural product that does not have the slightest contraindication during disposal at the end of its life cycle.