A drop-in bed liner is a protective covering designed for the cargo area of a pickup truck. Made from materials like plastic or rubber, it fits snugly into the truck bed, providing a barrier against scratches, dents, and rust. This type of liner is easy to install and can be removed if needed, making it a popular choice for truck owners. These liners help maintain the truck's resale value by preventing damage from heavy loads and weather conditions. Additionally, they often feature textured surfaces to prevent cargo from sliding around during transport, enhancing safety and convenience for users.