The Green Monster ESD stencil wiping roll is Pb-free compatible and antistatic. Said to prevent sparks that can damage components and cause voids in solder traces. Uses coarse ESD fibers. Fabric is said to have an aggressive cleaning surface. Reportedly provides more voids to collect solder paste, as opposed to smearing that results from using paper. Is made of a cross-linked acrylic polymer that bonds the fibers together. Porous product permits full use of the vacuum system.