Hi there Edelgado, Thanks for choosing Next Working day Flyers to your printing desires. We have now lots of cardstocks for flyers. Apparently, we do not have a water-proof material even though We have now h2o-resistant cardstock. We print in RGB; not CMYK like most other printers. Because we use https://griffinsixky.aioblogs.com/85702227/5-essential-elements-for-flyer-printing