For those of a nervous or delicate constitution - look away now !
I've used moulded ear plugs for the past ten years , initially a set of EAR's finest - fitted with filters designed to remove the most harmful frequencies experienced whilst riding a motorcycle & wearing a helmet , and for the past three years a set of UE's monitor jobbies . Prior to this experience I was something of a part time user of foam & rubber plugs of a variety of makes .
Some observations based on my experiences : -
*Fitted properly , foam plugs appear to block a wider spectrum and level of external noise than either of my moulded plugs .
*Unless fitted properly , foam plugs have an annoying tendency to work their way out and become pains in the ear/head
*With either moulded plug I am able to hear more ambient sound , including speech , GPS directions , etc. , than I can when using foam plugs . This , for me , is an advantage , as I need all the clues about what is happening around me that I can get .
*Both EAR and UE have treated me very well when I've had cause to contact them - EAR even going so far as to waive the cost of the plugs , as I'd had to travel to the Midlands to have them fitted , a journey that they had earlier promised I would not have to make .
*Both moulded sets are excellent "comfort defenders" when camping @ BMF Rallies , and ensure a good night's sleep no matter what is going on several feet from your head - it has been my experience that foam / rubber plugs work their way out during the course of a night's sleep .
Now for the "look away now" bits
*I have always cleaned my ears properely before having an impression taken - I can not say the same about going for a ride on my bike ! As one approaches ones seventh decade I've discovered that ones ears start to produce alarming quantities of gungey wax - not nice & certainly not conducive to achieving a proper "fit" . Some improvement in fit might be possible if one first removes the accumulated crud .
*Cleaning the moulded plugs needs to be a regular chore - again linked to the above copious quantities of wax .
*And finally , (aren't you glad that I'm coming to the end of this missive !) , I've found that the best fit has always been achieved after giving the moulded plug a brief suck in your mouth - the film of spittle eases the plug into it's proper location , and also ensures that you've cleaned the thing recently . Trust me you will not be keen to repeat putting an encrusted plug in your orifice in a hurry !
In short , I've stopped using foam and rubber plugs as they block too much sound and do not offer the additional benefits afforded by the moulded items . That said , I still have an emergency set in each of my bike jackets , for when I've left both sets of moulded plugs elsewhere .
So , like so many other things - you pays your money and you takes your choice .
All the best , Jim
ps.- one note of caution regarding moulded plugs - do not put them in to ensure a good nights sleep when sharing a room with a mate who has decided to stop in the bar for another Weisebier . It took him the best part of two hours to find the owner of the hotel & the necessary pass key to get into our room , as I was blissfully unaware of his thundering attempts to wake me up & open our door !