Installing Rubber Moulded Nose Pads
Rubber Moulded nose pads are very similar to Push-in nose pads. There are many flavors of rubber molded nose pads but most have a receiver on the frame that the rubber clips into. You can firmly pull off the existing nose pad and push on the new nose pad on the same receivers. The biggest issue we find with rubber moulded nose pads is that there are so many designs on the market that are frame-specific it's difficult to get replacements.
There is typically one choice:
First, contact the manufacturer of the sunglasses directly and provide your model number and see if they have replacement nose pads. If it's a current model you might be able to source nose pads from them.
Where to Get Replacement Nose Pads
Sunglass Fix carries an extensive range of nose pads and other repair accessories which can be found here.
Alternatively, many optometrists carry nose pads. Or your original sunglass manufacturer may be able to help.