The muc off 1ltr bike cleaner twin pack our unique muc off biodegradable cleaning formula makes life easy regardless of the weather conditions or time of the year muc off biodegradable bike cleaner has an incredibly effective cleaning formula containing 39nano technology39 that also cares for your bike39s delicate finishes it contains no harmful acids cfc39s or solvents and is fully biodegradable muc off 1ltr bike cleaner twin pack features pack includes 2 x 1lt muc off