The padding in my helmet was coming out and I considered getting a new one. But I didn't like how any fit, so I then thought about just replacing the pads. Now everything feels great, I get to keep my helmet (don't worry it is only a few years old) and it was super cheap.
I bought these pads when my old ones fell apart after 5 years of use in the Houston heat. Also ordered the retention system at the same time. Installation was easy, and now my old helmet feels like new.