oilskin oilskin /ˈɔɪlˌskɪn/

noun

1. A macintosh made from cotton fabric treated with oil and pigment to make it waterproof  ( oilskin , slicker [ N. American] )
   a macintosh made from cotton fabric treated with oil and pigment to make it waterproof
    She wore her yellow slicker to stay dry during the rainstorm.
   She wore her yellow slicker to stay dry during the rainstorm.