Yes, comfort is a significant variable. The Classic E.A.R. plugs are designed to expand into your ear canal in such a way that they cause no discomfort.
They are also easy to install. Just roll them between your fingers to reduce the diameter and jam them in. Quick and easy. I buy them 100 at a time.
BTW, although I've been wearing ear plugs on the bike and at rock concerts from the 70's, I did not avoid getting two hearing disorders, moderate hyperacusis and mild tinnitus. Not sure how this happened. I do like to crank up the home stereo.
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