Breathable mesh uppers are a type of material used in footwear, particularly in athletic shoes. They are designed with a network of tiny holes that allow air to circulate, helping to keep the feet cool and dry during physical activities. This ventilation reduces moisture buildup, which can lead to discomfort and odor. These uppers are often made from synthetic fibers, making them lightweight and flexible. The breathable nature of mesh also contributes to the overall comfort of the shoe, providing a snug fit while allowing for natural foot movement. Many popular brands, such as Nike and Adidas, incorporate breathable mesh uppers in their designs.