This Sleepypod thing is totally cool. This is Spirit's. I want my own! Sleepypod conducts safety crash tests on their carriers. And, when we ride, we buckle up. Check out their crash test videos & info on their Safety Test Program. Seatbelt straps allow the Sleepypod Mini to be secured in a CAR SEAT. The Sleepypod Medium can be attached to our car's SEAT BELTS. Our carry handle is padded as is the adjustable shoulder strap. The zipper pulls are ergonomic. The Mini fits beneath a wide range of airline seats. Don't want to fly but just sayin.'