These are my second pair of Keen boots. This makes hanging most of my items SO EASY! The second order most of the plastic pieces had cracks or holes as you can see. I could put 3 fingers between my foot and the strap. Seriously, the hat needs to sit around the head. Delivered quickly, easy to install. I looked at a bunch of these before I left and it was by far the best and easiest to use rooftop cargo bag that I saw. The two buttons beside the left mouse are the front edge and rear edge buttons. Just love them they look fantastic on and they are true to size . Bought this for my daughter and its super comfy and supportive.