Want To Know More?Keeping your baby’s mattress clean and dry is essential for safe. hygienic sleep. This mattress protector from Tutti Bambini is 100% waterproof and designed to protect your CoZee® mattress from any little accidents and is machine washable so you can remove for cleaning. The mattress protector is made from absorbent cotton. keeping your baby dry to get a better night’s sleep.Don’t Forget……we have sleep bags with different tog ratings which are ideal for babies who wriggle and kick off their bedding.