I have not encountered a canvas gloryhole yet…

My experiences with cloth gloryholes (e.g. bedsheet gloryholes) has led me to avoid them. They just don't give the same sense of anonymity and objectification. I don't want to be able to feel anything other than a cock going in a hole, you know? So I've looked for wood gloryholes only.

If you've tried canvas and wood, how do they compare? Is canvas significantly better than cloth or are they about the same compared to wood?