Digressing into ear muffs for shooting: I had an old pair that were so old the foam was falling apart. So, I found some foam and took scissors and glue and got them back as good as new. "Hmmm, I sez," if some is good, why is not more, better?" I added some more foam, and got another db reduction or so. I added foam until it was against my ears. Since that was an obvious stopping point, I did.
I guess you could add foam on the outside, covering it with duct tape. Sound deadening is sound deadening. Weight? Pad the head band. I've seen Korean women carry 55-gallon drums atop the head, half-full of water. Even a healthy American male could deal with an extra three or four ounces.
Ugly? Which is more important? Saving your hearing, or looking pretty?
Art