Obaby?s breathable dual core mattress has four different sleeping options thanks to the reversible core and cover so you can always find the best combination for your little one?s perfect night?s sleep. One side of the dual core mattress is designed for babies and features a firm 100% polyester inner fibre pad layer which not only offers a safe and comfortable night?s sleep but aids in muscle development and bone growth. It is also fully breathable, aiding airflow through the mattress to keep your baby cool. As your child grows, the mattress can be flipped to suit their changing needs. This side offers individual pocket springs, encased in a high grade of dent resistant nursery foam for superior comfort, to give increased support to your tot?s back, neck and head during sleep, promoting perfect posture and sweet dreams. One side of the dual cover is made from 3D Spacer fabric which increases airflow, breathability and offers total body support whilst moving perspiration away from the b