The nature of the mattress cover plays an important role in your baby's natural sleep rhythm. Above all, moisture caused by night-time sweating must be wicked away effectively. The optimal oxygen supply prevents accumulation of heat. The babybay® KlimaWave® Premium cover offers effective and reliable hygienic protection against moisture and humidity, but is still permeable to air. You do not need an additional water-repellent layer! The wonderfully soft hygiene cover adapts perfectly to the shape of your baby's body thanks to the elaborate quilting in a star design, and it provides support, thus ensuring your baby has a deep, long, restful and dreamy sleep. So your baby is always comfortable. The cover can be easily removed at any time thanks to its three-sided zip fastening and is washable up to 60°C. All mattress covers are tested for harmful substances and are awarded the "Confidence in Textiles" certificate in accordance with Ökotex Standard 100 Class 1 for babies (12.0.03346).