75% Cotton + 25% Synthetic Rayon Blend offer Higher Absorbency and Strength,Sturdy Sewing Neat Lines, Firmly Fixed Mop Head, Good for Long-Term Use. Scratch Free, No strings loss, Safe for all Hard Floor Surface. Long-lasting fibres allows mop head to be laundered many times (machine washable) giving it a longer service life. Fits Clamp-Style and Side Loading Handles, Easy to Install and Fit. 1 piece pack,each mop head weight around 450 gram / 16 oz. 75% Cotton + 25% Synthetic Rayon Blend offer Higher Absorbency and Strength. Sturdy Sewing Neat Lines, Firmly Fixed Mop Head, Good for Long-Term Use. No scratch / No hair loss / Easy to install and fit. Suitable for all kinds of floors :Wooden floor / Marble floor / Hard floor / Tile floor. Long-lasting fibres allows mop head to be laundered many times giving it a longer service life.