Trailgate Gear Bin Green 140 L vs Ultra- Sil Dry Bag: which is safer?
REI Co-op Trailgate Gear Bin Green 140 L is our pick: better on PFAS and on the overall hazard picture.
Our pick
REI Co-op
Trailgate Gear Bin Green 140 L
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleUV degradation and additive leaching
PossibleMicroplastics from mechanical wear
PossibleOdor and volatile organic compounds from manufacturing
Sea to Summit
Ultra- Sil Dry Bag
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleSilicone coating degradation and microplastic shedding
PossibleBacterial or mold growth if sealed wet
Where these two actually differ
- We flag UV degradation and additive leaching, Microplastics from mechanical wear and Odor and volatile organic compounds from manufacturing on the REI Co-op and not on the Sea to Summit.
- We flag Silicone coating degradation and microplastic shedding and Bacterial or mold growth if sealed wet on the Sea to Summit and not on the REI Co-op.
- The REI Co-op is Polypropylene storage bin, no water-resistant coating mentioned where the Sea to Summit is Silicone coated nylon fabric, which is most of the difference in these two grades.
- The gap is 45 points, wide enough that this is not a close call, and the REI Co-op is the one to buy.
- We are less certain about the Sea to Summit grade, at 52% confidence against 78%, because it discloses less.
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 bags: see the full ranking