Description Knitted in tube form from the highest quality, 100% continuous-filament polyester yarn, leaving only two raw edges (which are then sealed) No unsealed edges mean less potential for abrasion and contamination Durable, two-ply wiper offers two to three times the absorbency of single-ply polyester Laundered and packaged in an ISO Class 4 (Class 10) environment Order Info Basis weight: 134g/m 2 (17-988-421); 177g/m 2 (17-988-422).