Crib bumper or no crib bumper?

I had been wondering the same thing, I think they will be fine though as long as no blankets, stuffed animals or pillows are left in the crib. My mom told me without them there is a chance that babies could get arms or legs stuck inbetween the bars in the crib. Im going to use mine, Just remember that they are not necessary once the baby can roll around, sit up or crawl because they can use the bumpers as steps to fall out of the crib