I have a 10mo crawler/cruiser that we took on a camping trip in our pop-up camper. The weather forecast was lots of rain, which meant we probably would be holed up in the camper the whole time. This little guy loves to move, but there isnt much floor space, and the little that there is is usually dirty and or being used by others moving around.I needed a solution to give my baby a play area.In comes the bed rail! This bed rail can be disassembled for compact storage, which was a must have in the pop-up camper. It also needed to be able to be secure without the use of screws. This one has a long strap that runs under the mattress and anchors to the opposite side of the bed. We also went ahead and ran it under the canvas to the outside of the bunk end for extra security since it isnt a real mattress.The length was perfect for the popup. There is about 12 inches left, which we put all at one end of the rail so that we and big brother could easily climb in and out of the bed when needed. We just blocked the opening with a duffel bag or other item so baby couldnt crawl out.There is definitely some wiggle slack to this bed rail, but it seemed sturdy enough for the 10mo baby that i wasnt concerned if he leaned on it. We just made sure that big brother knew not to lean on it.This rail made this bunk end bed into a giant playpen. Baby could have the whole bed to crawl and play with his toys, and mom had the piece of mind that he couldnt fall off, and had the freedom to get things done.As you can see in the pic, the height of the rail was perfect. The popup mattress is only a few inches thick, so with a real mattress, the height would not work for preventing babies from climbing over it.As a bonus, I was able to fold the bed rail down so that it lays under the mattress when we got ready to pack up to go home. This means that I dont have to disassemble it everytime. It only bumped the mattress up a couple inches where the "feet" of the rail is under the mattress, so the popup had no trouble closing up.Because of the lip of the bed slide frame, we are unable to use the swing down feature when used in this situation.