"Breathable" refers to materials that allow air and moisture to pass through them. This property is essential in clothing, especially for outdoor and athletic wear, as it helps regulate body temperature and keeps the wearer comfortable. Fabrics like cotton and polyester can be designed to be breathable, making them suitable for various activities. In addition to clothing, breathable materials are also important in construction and home design. For example, breathable membranes in roofs and walls help prevent moisture buildup, which can lead to mold and structural damage. These materials contribute to healthier indoor environments by allowing trapped air and humidity to escape.