I have noticed that many1 Canon lens hoods contain a felt-like matte black material designed to reduce reflections. The material probably does so admirably, but tends to get dusty over time.
On the other hand, third party lenses like Tamron have a sawtooth plastic inner surface in the lens hood. An immediate benefit is that dust doesn't stick to this sawtooth surface.
Does the sawtooth plastic inner surface work acceptably to reduce reflections? Is it equal or worse (or better) in terms of image quality when compared to Canon's felt-like matte black material?
(1): I looked again at my lens hoods, and indeed, the cheap 50mm "nifty fifty" lens hood does not have this material. It even does not have a sawtooth surface. But it's a cheap lens, probably Canon's cheapest.