The Ruffwear Load Up Harness is a car harness designed to safely travel with dogs to and from adventures. Built with strength-rated hardware and components, the Load Up Harness has been successfully tested to withstand the rigors of a vehicle crash test. Attaches to existing seat belts for a universal fit. Keeps dogs secure during sudden vehicle movements and allows drivers to focus. This car harness is easy to put on and adjust, comfortable for dogs to wear during extended travel, and can be left on dogs for bathroom breaks and during rest stops.