The Rocketeer Pack - Multifunctional Harness The Rocketeer Pack is a patented dog harness designed to protect your pet in case of a car accident. Pet safety in the car is essential not just for our dogs, but for the whole family traveling in the car. The Rocketeer Pack is custom-designed for small dogs 25 lbs & smaller. WHAT’S IN THE BOX: The Rocketeer Pack velcro harness, Dog car harness, Backpack / front pack straps, Child seat anchor straps, Headrest strap **Sizes: XS. I originally bought it for my dog but he hit a growth spurt and I didn't want to take the chance with the installation based on the measurements. The XS is just an open plastic but the tags are still on.