Ikea KRUMMELUR Foam mattress for crib

The outer cover is easy to remove and is machine washable at 140°F (Hot). A fixed inner cover increases the fire safety of the mattress and makes it easy to put the outer cover back on after washing. It also prevents children from putting mattress contents in their mouth. The mattress has two different surfaces ‒ one wavy side with medium-firm comfort and one smooth side which is firmer.