They are a harder material, so less shrinkage and less slippage. I had terrible slippage issues with my old Silicone ones. And I now have a vent to allow my ears to breathe whereas before had issues with my ears being sore and getting spots. I would ask for new moulds but the NHS don’t like doing them often but I found they didn’t last long before becoming quite irritable.
They are a lot lighter as well compared to my silicone ones, and as you can see, almost virtually invisible in the ear. With the tubing thinner as well and positioned lower than they were on the old ones, it has made it quite invisible and not obvious that I have ear moulds.
I am still getting used to them as quite different but I am so thrilled with them. They cost £300 but so worth it and they are expected to last at least three years. Wish I went private sooner! The NHS even said I couldn’t have thinner tubing due to my aids but I can hear just as well with the thinner tubing, I think it depends on the design of the moulds etc and there is more choice privately.
My audiologist checked against different manufacturers to determine the requirements for my aids and for future hearing aids with regards to thinner tubing and the vent size so he made sure it was suitable for me and my needs.