4 ply tight twist, looped end yarn designed for maximum laundrability. Long loops facilitate maximum dust collection. Backing is made from heavy duty 100% polyester backing to withstand professional use. Innovative construction allows for maximum surface contact. This product is certified by Green Seal for Environmental Innovation based on 100% post-industrial recovered blends resulting in significant reductions in greenhouse gas emissions, water consumption, & soil and water contamination, while establishing a circular supply chain with garment manufacturers.