"travel scrub" to be a pretty darned good use. While Etude recommends you use an ENTIRE sachet each time you scrub your face you'll never be done scrubbing! I find half a sachet at a time will do and the sachet will keep it from drying out even if you scrub on the alternate day.
The scrub is a thick white cream with very fine scrubbing granules, presumably baking soda. It has a light fresh citrus scent that isn't overwhelming but that I enjoy. As you scrub the grains will dissolve and disappear at which point you can rinse off and reveal glowing, clean and lovely soft skin. I find it helpful in clearing up clogged pores and pimples too.
For review I used up two sachets over a period of two weeks.
One problem I have with the scrub though is that I find it really hard to rinse off the soapy residue. Even after several rinses and going over again with a facial wash my face and hands still feel slightly soapy. I recommend this for use in the shower then - to minimise frustration. It's pretty gentle but I think you should scrub with this more than three times a week.
Overall, I love it and will be happy to tote a sachet or two along on trips.
Pick it up for Etude House for about RM30, each box contains 24 sachets.