PlugsSafety PSZOIND-PP Vinyl Zip-Outs with PermaPlug Ear Plugs For Hard Hats (Case of 24)
http://www.amazon.com/gp/product/B00B7S80K6?tag=sukses2015-20
Patented retractable hearing protection that installs in hardhats in seconds with the ability to replace ear plugs
Meets OSHA and ANSI requirements
Durable vinyl zipper cover lasts a lifetime
Nylon zipper will not rust
Certified 3M adhesive is tested to withstand extreme heat and cold