The cover contains no PVC vinyl so it is phthalate free and does not let off gas. The extra firm thermo bonded polyester core is 2 sided with an extra firm side for infants and a comfort layer on the toddler side (after 12 m​onths) for a more comfortable sleep surface for your growing toddler. The core is 99.9% VOC free and combined with the organic cotton cover provides your baby with a healthy sleep environment that is natural and breathable, from infant to toddler. The cover is water and stain resistant. Lightweight for easier sheet changing. Great for toddler beds too! Features: -10 year warranty -Thermo bonded recycled polyester core 99.9% VOC free -Extra firm support -2-in-1 firmness – extra firm side for infants with a comfort layer on toddler side (after 12 months) for a more comfortable sleep surface -Lightweight for easier sheet changing -Cover has a top layer made of organic cotton which is naturally breathable, for a soft and comfortable feel -Cover is PVC vinyl and phthalate free and does not off-gas -Water and stain resistant -Mold and mildew resistant Size: Mattress size 27 ½” x 51 1/2” (69.85 x 132.1 cm). Fits standard size cribs 5 1/4” (13.3 cm) thickness Maximum weight 50 lbs (22.3 kg) Made in Canada