Muc-Off Dry Chain Lube is a durable, deep penetrating chain lubricant and oil that's formulated to hold up in extreme conditions that would destroy ordinary chain lubes. Muc-Off Dry Lube is a highly versatile, dry weather chain oil that has state of the art penetrative qualities to ensure that the lube is driven deep into each chain link's core. And there's no need to worry because Muc-Off Dry Lube is biodegradable*, so it's safe for you, your bike and the planet. *Only contents are biodegradable. PTFE Free