Just got these yesterday. According to the website it's the "Highest Rated Reusable Ear Plug Currently Made Anywhere in the World..." so I would give them a go. It has a NRR 32 rating. I got them here http://store.yahoo.com/earplugstore/silnatrubear.html
I was using some $50 fancy earplugs I got. I can't remember the ones but they are they come with a red pouch. They look a bit like these http://www.allearplugs.com/AEP6/Ear-...-(x1-pair).htm. I think some of you will know the ones I'm talking bout. From memory these have a NRR 26 rating.
According to the description that came with the SilentEar earplugs it should cut noise by half the volume and also reduce noise over 85dB. What can I say except that it does what it says. In comparison the fancy ones I have only reduce the noice by a quarter of the volume. (guesstimate).
When I used it this morning for my ride to work it was definitely much quieter than my old ones. I got up to about 110km/h and it was still very quiet. It also fits better. The earplugs come in 3 sizes. Because I didn't know which size I would need I got a 3-pack that had one of each size. I tried that small size this morning. It was a bit too small for me but it still kept the noise out regardless. So I'm going to try the medium tomorrow. Note: It may felt snug when I was trying it out at home but it felt lose when I was riding.
Cost? Not too bad at all. For the three pairs of ear plugs it cost me about US$20 (~nz$30) including shipping. It arrived in about a week. The earplugs also have it's own containers with a key ring.
Overall, I'm very happy with the ear plugs. I've tried foam ear plugs and a couple of other ones but these have to be the best ear plugs that I've used so far and also the most comfortable.
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