Bamboo cored Donek, I will never go back to the standard. Sean is building me a replacement to this board, biggest difference with be a 14/30m scr instead of a 14/24m and a different top sheet which will be carbon fiber. I gave the General everything I had, no failures, great energy, quite honestly best board I have ever owned. I know that Sean has a stack of Bamboo (possibly even pre made cores) in the shop. Hit him up!