We do not recommend that you use a conventional mattress pad or protector as that would take away from the breathability of the mattress. All Newton covers zip off and can be washed as much as needed quickly. Because the cover is water-resistant, most messes do not go through to the core, but you can clean even the mattress core in the tub or shower.
Once messes get a bit larger during the toddler years, you may want to add a layer of waterproof protection to make cleaning even easier. For that, we offer the Crib Mattress Pad that is both waterproof and breathable. The pad fits like a sheet over any crib mattress and gives you the waterproof protection you want and the breathability your little one needs. Our pad is also a great way to bring Newton on the go: vacation, dropping at childcare, or simply taking a trip to the in-laws. Our mattress pad fits perfectly in a diaper bag and will give Newton's breathability, safety, and comfort to ANY crib mattress. Find the pads here.