4-in-1 design is perfect for traveling with your pet. The airline-approved Snoozer™ Roll-Around Pet Carrier's converts into a rolling tote, backpack, car seat or pet bed, making it easy for pet owners to take their best friend just about anywhere. Traveling with your pet is easy with the Snoozer™ Roll-Around Pet Carrier. Your dog or cat will love the comfy, padded microfiber interior that lets him see out, and you'll love its easy-glide wheels and extendable handle that won't strain your back and shoulders. And if the terrain gets rough or there are stairs to climb, it converts into a handy backpack! Plus, the small and medium sizes are regulation size for carry-on, so you can slip it out of the way under the seat in front of you with your best friend nearby!