Because parents' main concern is always their child's comfort, Babymoov developed a very comfortable ergonomic wedge mattress for your little ones: Cosymat. It's easy to use: simply slide Cosymat under the fitted sheet in the crib. Its 15° incline and ergonomic shape provide an elevated position for the child. This position is ideal for promoting digestion, reducing reflux, or keeping the airways clear during a cold. Bi-material: Cosymat is both very soft and breathable. Practical: The pillow cover is removable and machine washable. You will love this product for its ideal 15° incline that promotes digestion and keeps the airways clear, its ergonomic shape, the fact that it slides under the fitted sheet in the crib, its breathable and very soft bi-material, and its removable, machine-washable cover (30°).