Hello there Edelgado, Thank you for selecting Following Working day Flyers for your printing requirements. We've got lots of cardstocks for flyers. Apparently, we do not need a water-proof materials although we have h2o-resistant cardstock. You might prefer to use coating possibly on each side or merely the entrance facet https://cesarcsgtg.blog2freedom.com/32440965/the-basic-principles-of-flyer-printing