90lb foiled 12"x12" cardstock.
From the manufacturer:
With the hundreds of choices in cardstock Bazzill offers, you are guaranteed to find just the right one with the perfect finish for all of your scrapbook, card making and paper craft projects of all kinds. This package contains Bazzill Foil Cardstock, 12x12 inch sheets of high quality cardstock. Available in a variety of colors, each sold separately. Made in the USA.