SIZE: This is the MINI-CRIB version of our top-rated breathable mattress. This product measures 38" x 24" x 3".100% BREATHABLE: With innovative breathe-thru technology, our breathable essential crib mattress features a unique woven core that allow your baby to breathe right through it. Even our dual layer cover is completely breathable. Because of its airy construction, it is extremely breathable and delivers a safe sleep surface for your baby's well-being..100% WASHABLE: The mattress that’s washable from the cover to the core! With a unique design and construction, our washable crib mattress is made from quality materials that fit most MINI-SIZE cribs (37.75" x 23.75" x 3") and doesn't have any foam, glue, latex, or springs that may go bad over time. Safe and gentle to the skin of your babies, which will help them sleep comfortably. Our toddler bed mattress is also super easy to clean, so you can use it for many years..INFANT & TODDLER (2-STAGE): Crib mattresses can be a little convoluted, with all sorts of bells and whistles. But one thing is quite simple: your baby’s safety. Our crib mattress is designed with extra layers of comfort and support to help maintain baby's natural posture. Your baby's needs will change as he grows, and our baby crib mattresses help your baby through all stages of development..MADE BY PARENTS FOR PARENTS: As parents ourselves, we understand. We know that your baby’s safety comes first, and we also know how much you want to give them the right start in life. As experts in the area of sleep, we know just how important good sleep is for both of you. This is why we have devoted our time and expertise to creating a crib mattress, crib-sized sheets and covers, and crib and twin-sized mattress pads that are not only safer but also more comfortable.