Absorbent materials are substances that can soak up liquids or moisture. They have a porous structure, allowing them to trap water or other fluids within their fibers or pores. Common examples include sponges, paper towels, and cotton. These materials are widely used in various applications, from cleaning spills to personal hygiene products. The effectiveness of absorbent materials is often measured by their absorbency rate, which indicates how much liquid they can hold relative to their weight. In industries like construction and healthcare, absorbent materials play a crucial role in managing moisture and maintaining cleanliness.