Foam core carbon fiber is a great material when you want to reduce weight and strength isn’t as important. This material has a outside layer of CF sandwiched over a dense foam core. Currently we have stock in 2.0mm, 3.0mm, 4.0mm, 5.0mm, and 6.0mm. The CF thickness on the outside is dependent on the overall thickness of the material. If you are interested in this product, please contact us for more info.