A truck topper, also known as a camper shell or truck cap, is a cover that fits over the bed of a pickup truck. It is designed to provide additional storage space and protection for cargo, keeping it safe from weather elements and theft. Truck toppers come in various styles and materials, including fiberglass and aluminum, and can be customized with features like windows, doors, and racks. Many truck owners use a truck topper for recreational purposes, such as camping or transporting outdoor gear. They can also enhance the truck's aerodynamics, potentially improving fuel efficiency. Overall, a truck topper is a practical accessory for those who need extra utility from their vehicle.