The primary function of a rubber mat is to protect the truck bed from scratches, dents, and rust. Truck beds are frequently exposed to heavy loads, sharp tools, and other abrasive materials, which can cause significant damage over time. A rubber mat acts as a shield against these potential threats, absorbing impact and preventing direct contact between the cargo and the bed itself. This added layer of protection is especially vital for those who transport construction materials, landscaping supplies, or other heavy items.