Wire frame surrounding keeps dog carrier shape and wonAt collapse on petsSide pocket can store small goods conforms to under-seat dimensions of most airlines and mesh side offers pets good air. Every airline has a specific set of rules and regulations, please contact with airline prior to flying with your pet. carrying handles and adjustable padded shoulder strap is comfortable and light to carry the pet bag anywhere Back strap can fasten the carrier to your luggage Safety tether inside keeps your pets from jumping out Soft fleece mat included and can be folded easily to flat for storage