I;ve been mopping floors for over 50 years and I do it only many floors many times a week. I've always tried new mops in the hope that they will do a better job than previous ones I've tried. This is the one. I can only pray that they will never discontinue this one, as they do with everything else you get and love! It doesn't leave any water behind and it gets up EVERYTHING! Just love it!!!Get more detail about Sponge Head Refill, For PVA Sponge Mop, Absorbent, 12"w, Blue RUBG781.