Howard Leight AirSoft Reusable Earplug Cord Options:Uncorded It has an open bottom

It has an open bottom to accomodate guard rails

not a one-time use anchor like most kits

3M Diamond Grade reflective Bright Orange Mesh

Shelves: Three adjustable

Howard Leight AirSoft Reusable Earplug Cord Options:Uncorded It has an open bottomNRR 25Corded 50 pr bxUncorded 50 pr bx Optimized for exceptional in ear comfort, AirSofts new four flange design creates a better seal in the ear canal, delivering optimal protection and increased comfort for long term wear. Internal fins create an interlocking, noise blocking barrier within the air pocket, providing dependable attenuation for all wearers upon proper insertion. At the same time, AirSofts firm stem and tapered shape facilitate easy