Pace 3 GPS Sport Watch vs MG Navigator Band: which is safer?

WHOOP MG Navigator Band is the clear pick. COROS Pace 3 GPS Sport Watch carries a failing PFAS grade, and we never recommend buying a failing product.

Coros

Pace 3 GPS Sport Watch

PFAS grade

F 40/100

Overall grade

F 10/100

Verdict

Skip

Hazard flags

⚑ 4

Material

Stainless steel case, plastic band, waterproof resin coating

Confidence

55%

LikelyPFAS in waterproof coating

PossiblePlastic band degradation and leaching

PossibleCoating off-gassing

Why this grade

Our pick

Whoop

MG Navigator Band

PFAS grade

B 85/100

Overall grade

D 69/100

Verdict

Buy

Hazard flags

⚑ 4

Material

Elastomer band (silicone-based or similar)

Confidence

72%

PossibleSilicone elastomer degradation and microparticle release

PossibleSkin irritation from contact allergens or residual processing chemicals

PossibleBacterial or fungal growth in band crevices

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 waterproof fitness trackers: see the full ranking