haven't used this one but have used a wooden filament that's quite similar. The presence of these particles gives the 3D printed parts the aesthetics of real wood (woodymanreviews). This filament is also less abrasive compared to other composite filaments such as carbon-fiber filled and metal filled, since wood particles are much softer. There are some wood-like filaments on the market that only contain wood coloring, but no actual wood particles, so these typically have a very different look and feel.