Other features:4 ply, scrim reinforced, single sheet. WYPALL X50 Wipers are a cost effective, general purpose wiper made from 4ply tissue reinforced with a polyester scrim netting that offers superior wet strength. Unlike some paper wipers, WYPALL X50 Wipers won't fall apart when wet. The self-dispensing pop-up box is portable, so wipers can be taken to where they are needed. It also has a space to write the user's name on the box, helping to control usage.