A door sweep is a weatherproofing accessory installed at the bottom of a door. It helps seal the gap between the door and the floor, preventing drafts, dust, and moisture from entering a building. Door sweeps can be made from various materials, including rubber, vinyl, or bristle, and they come in different sizes to fit various door types. In addition to improving energy efficiency, a door sweep can enhance security by making it harder for pests to enter. Proper installation of a door sweep can also reduce noise from outside, contributing to a quieter indoor environment.