The black surface of the Jende Nanoclot strop board is made of synthetic material. The surface is consistent in every direction, meaning you get the same feel when moving the knife in any direction. The surface features a honeycomb pattern developed by Jende. This helps collect and retain diamond emulsion in place. The Nanoclot absorbs diamond emulsion itself, and after 2-3 charging cycles, you will get a much longer life out of this strop than a basic leather strop.
The boards are color-coded and labeled with Micron.