Mousepad thickness won't change stopping power.

No.

Stopping power – the friction that slows your mouse down after a flick – is entirely determined by the surface material and weave, not how thick the pad is. A thick pad might feel slightly softer because your mouse sinks into the foam a bit, but that alters comfort and consistency, not actual friction. A thin pad on a hard desk gives a more predictable, uniform surface.

If you want more stopping power, get a slower surface (a “control” pad), not a thicker one. If you want less, get a speed pad. Thickness just affects wrist comfort and whether the pad lies flat.

Don’t overthink thickness – focus on the surface weave.