Humangear Stax vs YETI LoadOut GoBox 15 Gear Case: which is safer?

Humangear Stax is our pick: better on PFAS and on the overall hazard picture.

Our pick

REI

Humangear Stax

PFAS grade

A 100/100

Overall grade

B 84/100

Verdict

Buy

Hazard flags

⚑ 4

Material

polypropylene plastic

Confidence

72%

PossibleMicroplastic release from mechanical wear

PossibleThermal degradation and chemical leaching at elevated temperatures

PossibleMold and bacterial growth in crevices

Why this gradeBuy

REI

YETI LoadOut GoBox 15 Gear Case

PFAS grade

B 85/100

Overall grade

B 81/100

Verdict

Buy

Hazard flags

⚑ 1

Material

Rotomolded polyethylene plastic with latch hardware

Confidence

72%

PossibleMicroplastics from wear and UV degradation

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 outdoor gear storage: see the full ranking