Breathable and washable from cover to core, Newton's twin mattress is a nighttime game-changer. The removable cover is machine washable, and the innovative Wovenaire® core is completely washable too - ideal for the potty training years. It comes in three pieces to make it easy to transport to the shower or tub (don't worry, you can't feel the seams under the snug, plush cover). The mattress is firm to encourage healthy bone development, and ultra breathable for a sound night's sleep.