An eyeshadow brush is a makeup tool designed specifically for applying and blending eyeshadow on the eyelids. Typically made with soft bristles, these brushes come in various shapes and sizes to achieve different effects, such as precise application or a more diffused look. Using an eyeshadow brush allows for better control and even distribution of product compared to using fingers. Many brushes are made from synthetic or natural fibers, catering to different preferences and makeup styles. Proper cleaning and maintenance of the brush are essential for hygiene and longevity.