17" X 17" Replacement Seat Cushion - Knife Edge, Knife-Edge/Lattice Neptune - Grandin Road vs Covers & All Square Cushion Slipcover: which is safer?

17" X 17" Replacement Seat Cushion - Knife Edge, Knife-Edge/Lattice Neptune - Grandin Road is our pick: better on PFAS and on the overall hazard picture.

Our pick

Grandin Road

17" X 17" Replacement Seat Cushion - Knife Edge, Knife-Edge/Lattice Neptune - Grandin Road

PFAS grade

C 75/100

Overall grade

F 61/100

Verdict

Buy with care

Hazard flags

⚑ 2

Material

Polyester blend fabric upholstery

Confidence

68%

PossibleAzo dyes and color-fastness

ReportedMicroplastics from polyester shedding

Why this gradeBuy

Target

Covers & All Square Cushion Slipcover

PFAS grade

C 75/100

Overall grade

F 59/100

Verdict

Buy

Hazard flags

⚑ 4

Material

Cotton or cotton-blend slipcover fabric

Confidence

72%

PossibleFormaldehyde in fabric resins and dye-fixers

PossibleAzo dyes and heavy-metal dye contamination

PossibleMicrofiber shedding from polyester blend

Why this gradeBuy

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 outdoor furniture cushions: see the full ranking