1,Material:100% polyester. 2,laundered by ultra clean water. 3,Suited to class1000~class10. 4,Vacuum Packaged in Clean Room. Feartures*100% continuous-filament Polyester Construction *Laser cut to prevent fiber release *Vacuum Packaged in JUJIE'CleanRoomBenifits* Assures cleanliness with ultralow levels of ions and extractables .*Softness and good absorbing water.*The Size of Cleanroom Wiper and ...