Kong Travel Ultimate Safety Tether is designed to securely restrain your pet in the car, ensuring they remain safely seated during travel. This tether typically comes with an adjustable length, allowing you to customize the restraint to suit your pet's size and the vehicle's setup. The tether can also keep your pet secure during stops and prevents them from jumping out of the car when doors. The tether is typically made from strong and durable materials to withstand the stresses of travel and ensure long-lasting use.