The shortcut CRW is for Carbon Reinforced Wood. Regularly OSP puts carbon layers next to the top ply with CRW remark. Sometimes they put the carbon sheets next to the core. They call it integral building method so this kind of blade construction called CRWi. 3 layers of carbon reinforcement the shortcut is 3CRW.

They emphasize their carbon blades are not composited but used for reinforcing the wooden laminas to get the carbon and wood advantages without the disadvantages.