Muc-Off Extreme chain lube was developed by their team of in-house boffins to provide maximum protection, no matter what mother nature can throw at your chain! Extreme Lube's polymer formula penetrates deep into the chain's links, to reduce wear and friction to a minimum in even the harshest of conditions. Muc-Off's non-drying hydrophobic lubricant film sticks to every link even during a long, rain soaked ride! Rest assured that Muc-Off Bio Drivetrain Cleaner (sold separately) will remove it quickly when the time does come for a clean and re-application! An added benefit to Muc-Off's unique formula is that it includes a UV Dye, which means you can accurately see the lubricants specific coverage when using a UV torch. This also allows you to wipe away any overspray that may have otherwise gone undetected. Suitable for standard, O, X and Z-Ring chains. For harsh weather on/off-road riding.