The Katy mattress is CertiPUR-US certified for being made without harmful chemicals like PBDEs, phthalates, ozone depleters, Mercury, heavy metals, Lead, or formaldehyde.
The cover is made of natural Aloe Vera and cotton with and so no worries there. This is especially important since the cover is the part that comes in contact with your body.
Katy also uses a natural fire retardant which is not just better for cooling but also safer for indoor air quality.
Overall, Katy is much safer than most memory foam mattresses and we didn’t notice side effects that are usually associated with cheap quality memory foam mattresses.