Chitosan Multi Use Styling Spray Refill 165m L vs Define & Refresh Styling Duo: which is safer?

Dyson Define & Refresh Styling Duo is our pick: better on PFAS and on the overall hazard picture.

Dyson

Chitosan Multi Use Styling Spray Refill 165m L

PFAS grade

C 75/100

Overall grade

F 43/100

Verdict

Buy with care

Hazard flags

⚑ 3

Material

Chitosan-based aerosol spray (biopolymer humectant)

Confidence

72%

PossiblePropellant inhalation risk (unspecified)

ReportedAerosol particle inhalation and lung deposit

LikelyLack of ingredient disclosure and testability

Why this gradeBuy

Our pick

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

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