I assume you are worried about off-gassing, and direct ingestion of harmful chemicals. TLDR: We stack up really well. 1) No flame retardants are used in the u

I assume you are worried about off-gassing, and direct ingestion of harmful chemicals. TLDR: We stack up really well. 1) No flame retardants are used in the upholstery. We worked really hard to meet the flammability requirements with materials that aren't doped in endocrine-disrupting flame retardants. So that was a big win, because that is the largest chemical exposure in legacy car seats (in my opinion) and it is one that the scientific literature is very clear about. 2) The chassis is mostly machined aluminum (powder-coated) and polycarbonate. On the underside of the chassis there are some bracket retention pieces that use a standard cyano-acrylic glue ("super glue").