Organic Wool Mattress vs iSeries NXG 13.5" Hybrid Mattress 3500: which is safer?
Avocado Organic Wool Mattress is our pick: better on PFAS and on the overall hazard picture.
Our pick
Avocado
Organic Wool Mattress
PFAS grade
A 100/100
Overall grade
A 92/100
Verdict
Buy
Hazard flags
⚑ 2
Material
organic wool, organic cotton, natural latex
Confidence
78%
PossibleLatex protein allergen exposure
PossibleMicrobial/dust mite growth in wool
Serta
iSeries NXG 13.5" Hybrid Mattress 3500
PFAS grade
C 75/100
Overall grade
F 53/100
Verdict
Buy with care
Hazard flags
⚑ 4
Material
foam core, fabric cover (composition unspecified by brand)
Confidence
45%
PossibleVOC off-gassing (polyurethane foam)
PossibleFlame retardant residues (type unknown)
PossibleFabric cover composition and durability
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More mattresses: see the full ranking