I'm running a few different helmets; a couple of Shoei's, a Shark Evo III, & a CFMoto. The units I run have 2earpiece/mic's (one unit per ear), basically a flat speaker that has the mic built into the forward edge & wires that run back under the helmet lining to plug into the streamlined UClear unit mounted on the side of the helmet. The speaker mic's just stick (Velcro) onto the liner of the helmet where your ears will be, the aren't any more than 1/4" thick so don't flatten your ears (l wear my glasses & sometimes my hearing aids too, but still haven't ever got sore ears from them) & if you were concerned, you could simply cut or trim a small section of liner out to give yourself more room anyway!! The CFMoto helmet was never made to take an in-helmet comms set; it is an open face helmet that is quite (read very) tightly conformed to the wearer's head, but the UClear speaker mic's are slim enough that once stuck on to the liner in the right spot(& they are easily moved/adjusted too) they are really pretty much un-noticeable!!
Oh, btw I now boast a 'military style industrial deafness' mod/severe hearing loss requiring the wearing of bi-lateral hearing aids just to hear close, normal conversation in normal/quiet conditions, but the UClear speaker mic's can be fitted in exactly the right spot such that the volume is better than adequate for me to hear even over the modded a/mkt(read loud) muffler noise, so much so that I rarely bother wearing the aids while riding; altho if I'm only doing a short trip or travelling in a group with lots of stop/start socialising, it's no issue at all to leave my hearing aids in & still have no pressure issues!!
Over the years I've tried all sorts of other comms units, in-helmet speakers, mic's etc, & really, these UClear units are just so much better & clearer, both for me listening & for others hearing me via the mic/comms or over Bluetooth phone connections etc, that there is no direct comparison!! Nothing else I've ever used comes anywhere near the UClear gear! :thumbup: