The mattress is of good quality, much better than the one sold with Windoo nacelle Bébé Confort. However, be careful if you buy it for this platform, it is too wide at the handle of the basket and it is not safe nor comfortable for a newborn. We disjointed and intersected itself at that location so that it fits snugly. Small problem: the product description, Amazon said that the cover is machine washable at 40 ° C but the mattress is not removable. So unless you do battle and sew the bag to wash, this information is not to be considered for purchase. Otherwise, the mattress is for me a good acquisition. My baby will be much better than on the top mattress sold with Windoo.