I tried two sihe?s and had the same problem with both sizes. I used steel ramps, that raised the rear of the vehicle 12 inches. They are a bit difficult to get on, because the back doesn?t always pull up. Like I said, it is adorable but I think the material they use is too stiff. These are fine if you don?t hang anything on them. a little wide with a comfy and roomy style great for outdoor play, at the beach or pool. I didnt want to dril into my wall so i tried to use mounting tape to stick them up. Consider this: Each port on a good USB hub is typically more than sufficient for a single device, but when using such a hub to power THIS charger wed be using a SINGLE USB PORT to charge ALL THREE devices on this charger. I am a normal width size ten and that?s what I ordered but In their shoe size I should of got an size 11 wide width. Vents??? Theres no vents!