moleskin \mole"skin`\ (m[=o]l"sk[i^]n), n.
1. Any fabric having a thick soft shag, like the fur of a
mole; esp., a kind of strong twilled fustian.
[1913 Webster]
2. A soft fabric having an adhesive backing, applied to the
skin at points susceptible to abrasion, as on the feet, to
prevent irritation or blistering during exercise, such as
hiking.
[PJC]