Non Wired Sports First Bra vs Second Skin Gel Sports Bra: which is safer?

Marks & Spencer Non Wired Sports First Bra is our pick: better on PFAS and on the overall hazard picture.

Our pick

Marks & Spencer

Non Wired Sports First Bra

PFAS grade

D 65/100

Overall grade

F 49/100

Verdict

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Hazard flags

⚑ 4

Material

polyamide, elastane blend

Confidence

72%

PossibleAzo dyes and synthetic colorants

PossibleFormaldehyde in textile finishing resins

PossibleElastane degradation and microfiber shedding

Why this grade

Marks & Spencer

Second Skin Gel Sports Bra

PFAS grade

F 20/100

Overall grade

F 6/100

Verdict

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Hazard flags

⚑ 2

Material

nylon elastane blend with moisture-wicking gel coating

Confidence

35%

PossibleCoating degradation and skin contact

ReportedElastane degradation under UV and chlorine

Why this grade

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 sports bras: see the full ranking