Both types to dog crates have their advantages. Wire dog cages have excellent ventilation, are easy to clean and can be purchased in a folding style which makes storage and transportation easy. On the other hand, dog kennels made of plastic offer the dog privacy and are the only dog crates approved for airline travel.
Dog Crates & Kennels - Spaces for Home or Away | Petco
Midwest iCrate Single Door Folding Dog Crates.
You & Me 1-Door Folding Dog Crate | Petco