Muc-Off Expanding Microcell Sponge. Muc-Offs Microcell expanding sponge is contoured to an ergonomic shape for maximum comfort and ease of use. Its vacuum packed it to take up less space and to use less packaging materials. Dont worry though once youve opened our perfectly pink sponge it expands into an easy to use bike and wheel friendly size.

Bike friendly size

Expands after opening

Ergonomic design