Moisture absorption refers to the process by which materials take in water vapor from the surrounding environment. This can occur in various substances, including sponges, wood, and certain types of fabric. The ability of a material to absorb moisture depends on its porosity and chemical composition. In practical applications, moisture absorption is important in fields like construction and textiles. For example, building materials that absorb too much moisture can lead to structural damage, while clothing designed to wick away moisture can enhance comfort. Understanding moisture absorption helps in selecting appropriate materials for specific uses.