Parents, listen up - this Home4me pack and play mattress is a total game changer for your little one's sleep! Measuring 38 x 26 inches, it fits most standard cribs perfectly (though definitely measure yours first to be sure). The 3-inch thickness provides that perfect balance of support and softness for your baby. What's really clever is the dual-sided design - one side with high-resilience memory foam for toddlers (9+ months) that's super comfortable, and the other side with high-density support foam for babies (0-9 months) that gives better spine support. The waterproof cover is a lifesaver - made from soft microfiber that's gentle on baby's skin while protecting the mattress from accidents. It's removable too for easy washing. The memory foam is CertiPUR-US certified, so you know it's safe and free from harmful chemicals. A little tip - if there's a slight odor when it arrives (common with compressed mattresses), just remove the cover to wash and let the mattress air out in a cool, ventilated spot for 48 hours. It might take 24-72 hours to fully expand to its proper shape after being vacuum-packed for shipping. This mattress transforms any pack and play into a cozy, comfortable sleeping space that your baby will love. Whether for naptime, bedtime, or just playtime, it provides the quality support growing babies need!