Rocha Fernandes Furniture, 2018-01-07 02:44:05. These chemicals that are used in these traditional mattresses are potentially very unhealthy to our babies. Chemicals that are used in these typical mattresses off-gas and the babies breath these gasses while they are sleeping. Phosphorus, antimony and arsenic are some of the chemicals that are used in the manufacture of the typical crib mattress. While there isnt actual proof that the use of these chemicals in these mattresses is related to SIDS (sudden infant death syndrome), what is known is that after chemicals were initially added to crib mattresses, the incidents of SIDS rose dramatically. While the chemicals used for the filling are bad enough, the moisture-proof vinyl covering has various potential health hazards as well. According to the FDA, the vinyl that has been used in the moisture-proof outer layer has been known to cause allergic reactions in many humans. Another issue with the moisture-proof vinyl outer layer is that this material does not breath and restricts air flow. When you consider that in conjunction with the chemicals used inside the traditional crib mattress it gets pretty scary. Even though the vinyl outer layer is moisture-proof, these chemicals can still leach through it and your baby can breath the gasses while inside the crib. The good news is that an organic crib mattress offers a safe and healthy option.