Stumbled across these labels by accident. As an environmental scientist, collecting soil/water/sediment samples, these labels are fantastic. They stick well, even on damp bottles/jars. They DO NOT peel away with a little moisture like all other labels. Laser printing looks great on them and doesn't scratch off. They may be a little harder to peel from the sheet than regular labels but the performance difference makes it well worth it. The sheets do curl in humidity after being printed, but it is the backing paper, not the labels themselves. An excellent product for field use in all weather! Wish they made them in 5161 size!