The PFAS Free Backpacks Guide: Which Brands Actually Test Clean in 2026 By Chester Takau · July 2026 Short answer: An EPA-certified lab test of 19 backpacks in 2023 found detectable organic fluorine — the marker for PFAS "forever chemicals" — in 13 of them, or 68%, with six brands over 100 ppm, high enough to mean the coating was applied on purpose. Fjällräven, Terra Thread, Deuter, Osprey, and Patagonia's PFC-free line are the most consistently recommended PFAS-free picks for 2026, while trusted names including Nike, REI, and JanSport turned up positive in that same test. New state laws taking effect in 2026 are pushing brands toward disclosure faster than at any point before. You don't need to throw out a backpack you already own — the leverage point is what you buy next. Is a "waterproof" or "water-resistant" backpack automatically full of PFAS? Not automatically, but it's the right thing to be suspicious of. For decades, the c...