Weatherstripping is a material used to seal gaps around doors and windows, helping to prevent air leaks. It can be made from various materials, including foam, rubber, and vinyl, and is designed to improve energy efficiency in homes by keeping warm or cool air inside. By reducing drafts, weatherstripping can lower heating and cooling costs, making it an important part of home maintenance. Installing it is usually a simple DIY task, and it can significantly enhance comfort by maintaining a consistent indoor temperature throughout the year.