I use the Walker's Razor electronic muffs, normally. NRR 23.
But I also generally double-up with the Walker's disposable foam ear plugs. NRR 32. These actually, IMO, offer sufficient protection for me against pistol and smaller caliber noise, that occasionally I've gone with just them. So long as they're inserted such that they fit tightly in the ear canal, most of the noise is damped quite well. Though, generally it's doubled-up with the muffs over them. Extreme amount of sound eliminated, with those, and the electronic feature of the muffs required in order to make any speech intelligible.
The plugs are a bit much for, say, loud movie theaters, but they work well. Some of the lowest-volume voices get nixed, with the things. Otherwise, they are good for that purpose.
For general road noise and construction type noises, I find them decent as well. But spoken words can be quite muffled, unless up close to a person.
Haven't seen many negative reviews of the things, either the simple foam plugs or the muffs.
