Define & Refresh Styling Duo vs Omega Leave-In Conditioning Spray: which is safer?

These two grade almost identically. Pick on price and preference; neither has a PFAS edge.

Dyson

Define & Refresh Styling Duo

PFAS grade

C 75/100

Overall grade

F 63/100

Verdict

Buy with care

Hazard flags

⚑ 3

Material

plastic housing, likely nylon/polymer barrel; ceramic or tourmaline-coated heating elements

Confidence

72%

PossibleVolatile organic compounds (VOC) off-gassing from plastic housing

PossibleCeramic/tourmaline coating degradation and thermal stability

PossibleFlame retardants or antimicrobial additives in polymer components

Why this gradeBuy

Dyson

Omega Leave-In Conditioning Spray

PFAS grade

C 75/100

Overall grade

F 63/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Water, conditioning agents, humectants (typical leave-in spray formulation)

Confidence

72%

PossibleFragrance allergens and skin sensitizers

PossibleSilicone or polymer buildup on hair

PossibleEye irritation if misapplied

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 hair spray: see the full ranking