I bought this for my puppy that is struggling to get into the car, on the bed, up on the couch, etc. I wanted something that would easily collapse so that I can take the stairs with us when we travel OR up and down between floors of the house. The stairs are sturdy and have a reinforced bottom piece that can be removed so that the stairs collapse easily. Our dog took to these stairs quickly and goes up and down with ease. My back is just as grateful as he is! I HIGHLY recommend these to anyone seeking something portable yet sturdy!