Stokke® Sleepi™ mini mattress Firmness for baby’s safety & comfort​ Layers of breathable 3d mesh for airflow Sorona® bicomponent stretch fiber core Compatible with the Stokke® Sleepi™ mini Both core and mattress are washable Approx. 30.1"W x 23.22"D x 1.4"T Weight: 1.0lbs Boxed weight: approx. 4.45lbs Polyester/elasterell-P Imported