The EverTrueâ„¢ Diamond is a 6â€ thick, dual-firmness foam crib mattress with advanced safety, health, and comfort features. We’ve combined Colgateâ€™s exclusive SecureCore TechnologyÂ® with a breathable honeycomb mesh spacer to provide unprecedented airflow. These unique components adapt to each childâ€™s sleeping position, provide increased air circulation, instant pressure relief, and continuous support where your child needs it most. The cover is made of CelliantÂ®, the worldâ€™s first biologically responsive fabric, which regulates body temperature and improves overall sleep quality. The dual firmness design provides the extra firmness infants need for proper development on one side and the added comfort toddlers prefer on the other using Diamond-channel gel memory foam. The Diamond features plant-oil infused eco foam and ultrasonically welded side seams. This mattress meets and exceeds all federal and state requirements for flammability and chemical composition and has earned the GREENGUARDÂ® Gold and Certi-PurUSÂ® certifications ensuring no harmful air emissions. It is manufactured in the U.S. by Colgate, a third generation, family-owned and operated company that has been making crib mattresses since 1955. This unit fits all standard size American cribs and toddler beds.