Polynit Heatseal Wipes are made of 100% knitted textured polyester with laser cut sealed edges for very low levels of particles and fibers. Polyester wipes are chemically resistant and exceptionally low in particles and fibers. An interlock knit creates a durable fabric, the addition of a periodic additional stitch of a no-run interlock knit prevents the fabric unraveling creating an even more durable fabric with strong edges. The wipes are laundered and packaged in an ISO Class 4 cleanroom. They have good sorbency with solvents and are abrasion and chemical resistant.