Mild disagree. I have a nylon belt, no wear very sturdy.. My old, high quality leather belt slightly adhere and stretched to fit my actual waistline. The nylon one stays in it’s perfect “cylinder” when on my body and the leather one flared out on parts and developed some dips over time. The leather one fit better overall, especially over time. I’m a big boy though, so this “feature” may be less relevant for more trim folks.