Interestingly, this baby mattress seems to be made with coconut saplings. And everything else is composed of anti-allergenic materials.

The covering material does not contain any PVC’s, unlike old style mattresses.
It provides a hygienic, anti-allergenic, breathable and moisture resistant surface which is wipe clean and washable, but at the same time allows air to pass through the material thus reducing perspiration and giving your baby a more comfortable nights sleep.

The foam complies with BS1877 : part 10 (1997) and BS7177 standards, as it is a “Combustion Modified High Resilience Foam”

via Little Urchins