This specially formulated cleaning gel lifts dirt and potentially damaging silica particles from the material prolonging life and enhancing performance.  Your feet sweat, a lot!  All that sweat has got to go somewhere and if your boots are excessively dirty or the outer fabric is sodden that sweat will just condense inside your boots.  Cleaning gel enhances the breathability of your footwear by removing ingrained dirt and maintaining the boots original water repellency.  We recommend regular cleaning especially prior to re-proofing your boots.