Blacktail 2 Backpacking Tent vs Cobra Stone 5 Tent: which is safer?
Big Agnes Blacktail 2 Backpacking Tent is our pick: better on PFAS and on the overall hazard picture.
Our pick
Big Agnes
Blacktail 2 Backpacking Tent
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleFluorinated water-repellent coating residues (PFOA/PFCs in historical treatments)
PossibleMold and bacterial growth in stored damp fabric
ReportedHeat sensitivity of water-repellent coating-coated nylon near fire or stove
Robens
Cobra Stone 5 Tent
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
LikelyPFAS in waterproof/water-repellent coating
PossibleVolatile organic compound off-gassing from coating
PossibleCoating degradation and microplastic shedding
Where these two actually differ
- We flag Fluorinated DWR coating residues (PFOA/PFCs in historical treatments), Mold and bacterial growth in stored damp fabric and Heat sensitivity of DWR-coated nylon near fire or stove on the Big Agnes and not on the Robens.
- We flag PFAS in waterproof/DWR coating, Volatile organic compound off-gassing from coating and Coating degradation and microplastic shedding on the Robens and not on the Big Agnes.
- The Big Agnes is Nylon ripstop with DWR coating (type unspecified) where the Robens is Polyester fabric with waterproof/DWR coating (type unspecified), which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our 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 camping tents & tarps: see the full ranking