I used XYD-Flex-1 flexible filament for these grips with the following settings:
Extruder: 240C
Platform:50C
Layer height 0.2mm
Shells:3
Infill: 25%
Internal diameter of the grips is 21.5mm that gives me a snug fit, that takes a little force to move on or off the handle bars.
The result is a thicker spongier grip that means I don't such a small diameter grip and there is some cushioning to the bumps.
The author marked this model as their own original creation.