Breathable materials are fabrics and materials that allow air to circulate freely, providing ventilation and keeping the body cool and dry. This is important for athletic wear, as it can improve comfort and performance during exercise. Breathable materials are also beneficial for everyday wear, especially in hot and humid climates. Some examples of breathable materials include cotton, linen, bamboo, and certain types of polyester and nylon. Using breathable materials in clothing and bedding can promote good health by reducing the risk of overheating, skin irritation, and other issues related to heat and moisture.