TOOGOO(R) 2X Pet Dog Cat Puppy Car Safety Seat Belt Harness Restraint Adjustable Lead Clip 100% Brand new & high quality The safety leash is made from a special material , provides a slight amount of stretch to absorb shock in the case of a sudden stop. The unique leash design integrates with the vehicle's seat belt tensioning device. Providing range of motion while traveling, but in the case of a sudden stop it locks in place to keep pets secure. This design also makes it easy to load and unload your pet, and installs easily in ALL vehicles.