What to avoid:

• PVC/vinyl covering (this type of plastic can release phthalates, which are endocrine disrupting chemicals that have been linked to asthma, developmental problems, and suppression of male hormones).
• Flame retardants (these chemicals do not actually work well to reduce flammability.  They may be carcinogenic and hormone disrupting)

What to look for:

• Pthalate free
• Green Guard Certified
• Made in the USA

The Winner is:  Moonlight Slumber Little Dreamer Dual Sleep Surface Crib Mattress 

Why I love this mattress:
The Little Dreamer Crib Mattress is incredibly good value non-toxic crib mattress that is made in the USA and is GreenGuard and CertiPUR Certified.   It is free of PVC/vinyl, phthalates and lead.  The Dual Surface Mattress has an extra firm side for young babies, and a softer side for toddlers. The foam is an eco-friendly, plant based foam. The outer cover is a waterproof, stretch knit fabric, which is resistant to bed bugs and dustmites. It is certified to be free of toxic flame-retardant chemicals and to be low VOC (meaning it does not off-gas chemicals into the air).  It also fits snugly within standard size cribs, which is important for infant safety.