Natural black pumice is a type of porous and lightweight volcanic rock that is primarily used as a skin exfoliant. Its black color comes from the presence of minerals such as iron oxide. This pumice stone is known for its ability to remove dead skin cells and soften rough skin, especially on areas such as feet, elbows, and hands. It is also used in the construction and gardening industries, as its porous texture makes it ideal for polishing and cleaning hard surfaces. It is important to note that pumice should be used with caution and moderation, as excessive use can cause skin irritation. Instructions for use The minimum instructions for use for TREBOL VERDE 750 ml. ECO room cleaning spray are as follows: 1. Shake the product well before use. 2. Spray the product directly onto the surfaces to be cleaned. 3. Leave for a few minutes to allow the product to penetrate and remove dirt. 4. Scrub with a sponge or brush, if necessary. 5. Rinse with plenty of water. 6. Dry with a clean cloth. Remember to read the full instructions on the product packaging before using it.