This is made well pushes effortlessly and the puppies are so comfortable in it including my Senior dog plenty of fresh air openings for them and spacious leg room I put 2 small Pomeranians one weighs 14 lbs and the other is 10 lbs they loved it . It was very easy to assemble in seconds no tools required also folds down nicely for storage! Thank you very happy with my purchase Marie from Branchburg NJ