One of the most important considerations is the size of the carrier. Is it large enough for your cat?
In addition, all carriers must have a few standard features.
Ventilation. Any cat, but especially one that is stressed by traveling, needs to have the flow of air through the carrier to accommodate a possible increased breathing rate.
Security. Make certain it can be latched securely. Dial latch systems or pinch latches don't accidentally come loose. Metal nuts and bolts are typically stronger than plastic and less likely to break.
Top-loading feature. Not only they are convienient but it's
good for ownwers whose cat make fuss while putting them in head
first.
Cat Carrier Tips
Let your cat become accustomed to his carrier.
Leave the carrier open in an accessible place every so often.
Put a comfortable bed or blanket inside so your cat will venture in to sleep.
Once in the carrier, give your cat some treats (or catnip) so he will associate being inside with something positive.
