A bed with the AeroSleep products should be made as follows: The mattress is placed at the bottom. Choose a high-density mattress for adequate support. On top of the mattress comes the AeroSleep mattress protector, with the air permeable 3D honeycomb structure facing up. Thanks to the mattress protector your baby can breathe freely at all times. Place the perforated Aerosleep fitted sheet on top. This guarantees the proper functioning of the AeroSleep mattress protector. You can also add several accessories such as the bed bumper and the pillow.