A truck cap, also known as a truck topper or camper shell, is a cover that fits over the bed of a pickup truck. It provides additional storage space and protection for cargo from weather elements like rain and snow. Truck caps come in various styles and materials, allowing users to choose one that best suits their needs. These caps can enhance the functionality of a truck by creating a secure area for tools, equipment, or recreational gear. Many truck caps also feature windows and doors for easy access, making them a popular choice for both work and leisure activities.