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For when I really need to concentrate: MAX(c) polyurethane foam earplugs (NRR 33) + Elvex UltraSonic HB-650 tactical hearing protectors (NRR 29)http://earplugstore.stores.yahoo.net/holemaxuffop. htmlhttp://www.elvex.com/tactical-hearing-protection-e armuffs.htm
For when I really need to concentrate:
. htmle armuffs.htm
MAX(c) polyurethane foam earplugs (NRR 33)
+ Elvex UltraSonic HB-650 tactical hearing protectors (NRR 29)
http://earplugstore.stores.yahoo.net/holemaxuffop
http://www.elvex.com/tactical-hearing-protection-