A 4 ply cotton yarn with a loose twist, which allows for maximum absorption and retention after break-in. This is our biggest seller for general cleaning and offers a low initial cost. These mops are constructed to make mop loading quick and simple without touching a dirty mop. A screw is placed through the headband and a metal band securely locks the yarn in place. Screw connectors are designed to lay flat on the floor and cover a larger surface area. All screw connectors have a narrow band which is double stitched for strength.