Flexifit Medium Support Sports Bra vs Second Skin Gel Sports Bra: which is safer?
Marks & Spencer Second Skin Gel Sports Bra is our pick: better on PFAS and on the overall hazard picture.
Marks & Spencer
Flexifit Medium Support Sports Bra
PFAS grade
F 20/100
Overall grade
F 0/100
Verdict
Skip
Hazard flags
⚑ 5
Material
Polyester/elastane blend with water-repellent coating treatment
Confidence
42%
LikelyFormaldehyde resins (polyester finishing)
PossibleAzo dyes and synthetic colorants
PossibleAntimony in polyester
Our pick
Marks & Spencer
Second Skin Gel Sports Bra
PFAS grade
F 20/100
Overall grade
F 6/100
Verdict
Skip
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
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