We conduct rigorous leach testing on all filter materials to ensure their inherent safety.
While the FDA uses a 24-hour immersion test for material migration, we have adopted a stricter standard—72 hours of immersion with continuous agitation—and the test results fully comply with FDA standards.
NanoFlex Carbon significantly reduces common organic contaminants in outdoor water sources to safe drinking levels, while also effectively reducing heavy metals and PFAS.
It further adsorbs free chlorine and calcium/magnesium ions, noticeably softening water and improving its taste.
Our high-strength PES hollow fiber membrane features a precise pore structure, with the majority at 0.035 microns, to reliably block even the smallest pathogens.
Our OASSAY filter has been officially tested and certified by SGS laboratories. It achieves a 99.999% removal rate for viruses, as measured by the rigorous MS2 bacteriophage test—the same standard used by NSF for viral filtration claims. We are currently pursuing NSF testing and will update our progress accordingly.
FlexFlow’s advanced purification is powered by OASSAY’s patented NanoFlex Carbon—proven through rigorous lab testing and honored with the Geneva Invention Silver Award. Backed by real data and global recognition, it delivers safe, effective, and trusted performance in every sip.
