Is the Nuna "lush, quilted mattress pad" suitable for a newborn?

When used with all of the Nuna-included components (including the mattress) Nuna's Sena Travel Cot meets and/or exceeds the mandatory Consumer Product Safety Commission (CPSC) regulations for play yards/travel cribs, and has been certified to the voluntary American Standards for Testing and Materials (ASTM) standards. The mattress is a big overall contributor to the product's safety testing and certification -- these sturdy mattresses work in concert with the play yard/travel cot to add stability and ensure that there are no potential entrapment gaps, ensuring that your baby's play/sleep environment is as safe as possible, and are firm but comfortable for kids ages newborn to 3 years.