The roba playpen mattress is designed for long and skin-friendly lying for the little ones. The soft PU foam core provides excellent lying and sitting comfort. The quilted and cozy cover is removable and washable thanks to the 3-sided zipper. With roba products, children can explore their world and experience many beautiful moments with their parents and playmates. The sleeping surface and the underside are made of 65% polyester and 35% cotton.