Hello there Edelgado, Thank you for selecting Future Day Flyers in your printing wants. Now we have lots of cardstocks for flyers. Apparently, we do not need a water resistant substance however We have now h2o-resistant cardstock. Yet another favourite may be the 4” x six” flyer as it’s useful https://caidenlpgsu.iyublog.com/31716557/5-simple-statements-about-flyer-printing-explained