I agree with the others, I just don't like the plastic carriers, so many have no ventilation. I made a cloth cover for the wire carrier, and Joey loves it and goes in it on his own. We use a soft carrier for a car seat and visits to the vet, it also worked great as a puppy bed, because it's small, he wouldn't pee in it. I could keep it next to my bed, and I would take him to a pee pad during the night, he became pad trained very quickly.
Snoozer Roll Around Pet Carrier and Car Seat Pets Dog and Cat Travel Supplies on Sale at Travelin Paws -