Review on Comfortable & Convenient Pet Carrier For Medium Cats And Small Dogs - Washable Bed, Multiple Doors & Shoulder Strap - Easy In & Out - Escape Proof - Light Green by Jacob Mayberry

I didn't travel with them yet but my cats love to sit in them .Its roomy, they can move nearly freely in them, and the have a good view outside . and it has ample ventilation from all sides for hot environments.Minor criticism , its a nitpicky one .The zipper handles are all wrapped needlessly in plastic , i think thats not needed and wasteful, The whole Carrier comes in the in plastic bag anyway.If you won't remove them right away cats can eat the plastic wrapper, at least that's what mine tried to do.