Stokke Sleepi Bed Mattress Air V3Firm with breathable layers for a safe sleep A mattress where theyll sleep like a baby. For optimal safety and comfort, its important that a baby mattress is high quality, firm and breathable. A breathable mattress ensures that the air can circulate and remove the carbon dioxide exhaled by the baby. In this way, overheating is avoided. This is especially important when the little ones turn over onto their stomachs while sleeping and breathe into the