MAC Volcanic Ash Exfoliator ($28.00 for 3.4 fl. oz.) is supposed to be a “foaming, cleansing, and exfoliating scrub” that combines volcanic ash with sugar crystals that is supposed to “leave skin feeling soft and comfortable clean.” I’ve been using this exfoliator on and off since it originally debuted in 2008. Why any brand rolls out limited edition skincare (or other basics, like eyeliners) is beyond my comprehension, but MAC has continued to re-release this exfoliator since 2008 in limited edition quantities. However, it is now part of the permanent skin care range!