When I bought it, I had doubts that they could be too hard. However, they are made from a very flexible silicone material that almost crushes and doesn't chafe against the skin. The design of the hooks allows the mask's ear loops to pass and stay in place. You'll forget you've put it in the mask after a while, but this makes the mask a little easier to wear and prevents the mask from pinching your nose and mouth without affecting the fit.
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