Love these. I have attached photos to this review to give you a better view of the set up and transport with these carriers . When set up they are very sturdy. We use them for two cats who are currently less then 5lbs each. The cats put up zero fight to get in the carriers because its a side entry. As you can see we easly secure the carriers in our back seat by placing the belt through the handle. The cats have plenty of room and more then enough outside viewing space. They fold up and set up in seconds and are easily stowed away. I am so glad we purchased these. If you are worried about sturdiness and or quality dont be. They are perfect cat carriers!