These great headphones have three main objectives: to sound good, to keep good sound in, and to keep bad sound out. Many headphones on the market these days don't adequately dampen background noise, and as a consequence people often blast the volume and unwittingly damage their hearing. And here at PK Safety, we are against that type of behavior. The good news is that Howard Leight's Sync Stereo Headphones can counter even the worst noise pollution you'll ever encounter. That's because Syncs are designed with much more than annoying office sounds in mind. They're built to meet OSHA standards for hazardous noise protection. Howard Leight Syncs from PK Safety through November 6th, 2011 and get an additional 25% off by entering Howard25 at checkout!