[d4n13ll33]

There are a lot of weird plastic shapes to the Quietpro design that I can see irritating and making someone's ear bleed. If it was the foam causing people to bleed, I'd find that very strange as there are millions of people that use earplugs for hours and hours on end with no problem :/

[e12e]

Maybe i wasn't clear: the problem appears for troops that use them in war zones: essentially days on end, not merely hours. If it was just the foam type used, I'm sure they'd try and mix it up with something more soft. That was a huge contract that was partially cancelled.

[veb]

I've always worn hearing aids, with ear moulds. They're worn all the time, except for sleep. Other deaf people I know, wear them while sleeping for some odd reason. I couldn't fathom to wear anything while sleeping!

They've never made my ears bleed, nor anyone else I know.

Maybe troops should wear properly fitted moulds :)

[e12e]

Well, you do take them out 8 hours of the day then. Here we're talking 24/7 in dry desert heat.

[d4n13ll33]

Hmm, yeah. That's some pretty interesting insights though! Thanks for sharing. Then it wasn't the foam, it's probably that their ears got irritated from that plastic housing - I've learned a LOT about designing for the ear these past months and that shape is not ergonomic, haha!