This foam board features a white core with brown kraft on both sides. The kraft paper surface is waterproof, and accepts many types of mediums, including glue, marker and paint. The matte surface reduces smearing. Board can be laser cut, etched, scored and easily cut by hand. It’s great for model airplanes as it can withstand rain, fog and mist, as well as be decorated and personalized. A great medium to use for STEM and STEAM projects, temporary signs and more. Acid Free.