High-quality substrate for reptiles, with a capacity of 6 liters each. Features: Pine Bed: Organic bacteria decompose ammonia, providing excellent deodorizing effects, and its high antioxidant properties also help to relieve stress on the animal. The chips are large, so there is no risk of accidental ingestion. Bio Geo Mat: Highly recommended substrate for all reptiles. Natto bacteria in the mat decompose feces and urine, suppressing the generation of odors and gnats, and the substrate can be used for about a year. It is recommended to stir the substrate once every three days to allow air to circulate. The chips are small, so if you are feeding crested geckos, etc., powdered artificial food mixed with water, it is better to take them out of the cage when feeding. The mat will stick to the food around their mouths, and they will eat it together. We use a mixture of Pine Bed (7 parts) and Bio Geo Mat (3 parts) for our crested geckos, gargoyle geckos, and leopard geckos. The risk of accidental ingestion has been eliminated. The Bio Geo Mat decomposes feces and urine, so there is no need to remove it, and we have been using it for about 8 months now, and there is no smell at all.