The pet smart cart carrier is an easy collapsible rolling cart that folds to less than 4 inch for easy storage. It fits airline safety and size requirements. The Pet Smart Cart Carrier has a removable padded comfort bedding and collar clip as well as a padded and adjustable shoulder strap. Contains large zipper pockets for treats, dog bags etc. It is designed with 3 sides of ventilation including the back door. The back opens wide for ease-of-access. It is made with durable, flexible water proof material.