Silent and breathable: Due to the soft, 100 % cotton cover, the mattress is very quiet and breathable, even when the baby moves. Very comfortable: The child-friendly and high-quality foam mattress with a height of 6 cm (cheaper alternatives are often only 4.5 cm or 5 cm thick) makes this baby mattress very comfortable. This ensures your child will have a restful night's sleep in every travel cot.