The Muc-Off Bicycle Care Duo Kit with Sponge covers stage 1 and 2 in the Muc-Off cleaning system. Nano Tech Bike Cleaner cuts through dirt, mud, and grime quickly and safely without the need for acids or dangerous chemicals. Muc-Off Bike Spray is the ultimate post-wash water dispersant. Not only does Bike Spray rid your bike's frame and components of moisture, but it also leaves a non-sticky layer of protective PTFE to prevent rust and corrosion. Muc-Off's Microcell expanding sponge is contoured to an ergonomic shape for maximum comfort and ease of use. The Muc-Off Bicycle Care Duo Kit with Sponge makes future cleaning and maintenance a breeze.