buy some mesh, like the sides of a play pen and make a sleeve for the crib rails, make it tight, and you are going to have to take the crib apart, but that's a small price to pay for not worrying about your child suffocating, or getting his arms and legs stuck. The mesh will provide the protection from putting his hands and feet through, and still allow him to breathe if he smashes his face up to it, just remember to MAKE IT TIGHT so he cannot wrap it around his face! I wish I would have thought of it when my daughter was little!!!