The Stokke Sleepi Mini mattress with organic cover is Designed by Stokke® and handcrafted in USA by Colgate. The modern, ultra-soft organic cotton cloth cover is Lead/Phthalates FREE and Greenguard® Gold Certified. Details Extra firm Polyethylene layer for infant support and ... Dissipates heat away from baby NaturesWeave™ open air construction, for maximum airflow and pressure relief Ultra-soft organic cotton cloth cover Greenguard Gold Certified Stokke® Sleepi™ Mini Organic Mattress by Colgate