Polyester Synthetic Fiber (psf) media is extremely resilient and will withstand direct moisture. In many cases a psf media is the ideal alternative to spun glass.
It makes an excellent pre-filter for high efficiency filters and offers high arrestance and dust holding capacity. Bulk media rolls are offered in selected slit widths with roll lengths determined by manufacturing processes. Pre-cut pads, as the name implies, are pads of filtration media cut to standard filter face sizes or to your desired custom sizes.