Welcome to the forum. I am using a Toddler Bed Rail Guard to keep everything on the overhead bunk. It slips underneath the pad and flips up to keep everything up there. When I need to access something on the overhead bunk, I push the two latches(one on each side rail) to fold it down. Works like a champ and nothing falls down. I bought it on Amazon. It was the Toddler Twin bed size. Not expensive and works great. I also use it when my grandson sleeps in the overhead bunk to be sure he does not roll off.