D.
We have a 17 month old and have used the breathable bumper for her since she was tiny. We didn't want to use the thick ones due to SIDS and she too was sticking her feet through the slots on her crib. This bumper works great and I feel much more at peace knowing she won't block her breathing if she leans her face into it. Target has the cutest ones (if you order on-line) since you can get ones that have a nice border and not just plain white.
D.