Pura Fit and Howard Leight Max have the same shape and size?
These two are shaped more like the Hearos. I've never tried the Hearos, but from the looks of them, they look like they're made out of a similar type of softer foam like the Pura Fit and Max plugs, so I would expect them to be as comfortable.
http://www.moldex.com/hearing-protection/foam-earplugs/pura-fit.phphttp://www.howardleight.com/segment/index/1In addition to looking at gun shops & sporting goods stores, you could try a workwear/safety equipment store where construction/industrial workers go to buy safety shoes, reflective vests, etc.
The decibel difference of the Hearoes is only about 2 decibels so it's no big deal.
I disagree, but then I admit I'm a little anal on this subject. It comes from my own negligence in my youth and paying the price now with tinitus.
The way the decibel scale works, 2dB can matter. On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB, and so on, up the scale. Exposure to sound levels of 85dB or more will cause permanent hearing loss, so you want to use the protection that will get you to a level below that. I don't know what dB level we are exposed to riding along, especially considering all the variables (exhaust systems, helmets, windscreens, riding positions, city or country rides, etc.), but consider an "average" lawn mower is is 90dB and a rock concert or jet engine at take-off is 120dB. We're probably in between somewhere, so the extra 2dB could be the difference.
FWIW, Hearos as shown in the previos pic is NRR 32, which is only 1dB lower than the highest rated ones on the market, and Hearos makes an Extreme model (that are blue) that has the NRR 33 rating.
I prefer the softer foam of the Hearoes, I can wear them all day.
There's the main thing though... the NRR rating is pointless if you won't wear the plugs because they're uncomfortable!