For an Undisturbed Sleep! With dual air layers to foster oxygen flow inside the mattress, your child is more likely to sleep sound and undisturbed. The certified non-toxic foam core provides support while the superior softness of all natural eucalyptus provides comfort. 2-sided design ensures a firm and breathable sleep space for infants. Flip the Pebble Lite over for a plush yet equally breathable toddler mattress.