I didn't think to use these for many years but once I found how well they kept my notes and song lyrics in my home made fake books I can't be without them. We take these notebooks full of music to rehearsals jobs and so forth. The sheets take a lot of abuse. These sheet protectors help them last years instead of months.
it's a great way to protect papers on the walls. put the paper in upside down and put a piece of tape on the bottom. this way if there is a leak in the ceiling the paper is protected!