Bed nets are protective nets designed to be placed over beds to prevent insect bites, particularly from mosquitoes. They are often treated with insecticides to enhance their effectiveness in repelling or killing insects. Bed nets are commonly used in areas where diseases like malaria and dengue fever are prevalent, as these diseases are transmitted by mosquito bites. These nets come in various sizes and can be used for both individual beds and larger sleeping areas. They are typically made from lightweight, breathable materials, making them easy to use and transport. The use of bed nets is a key strategy in public health efforts to reduce the spread of mosquito-borne illnesses.