AirSoft® Reusable Earplug, Thermoplastic Elastomer, Blue Red, Uncorded ORS NASCO Heavy non spark striking face with Heavy non spark striking face with soft impact Malleable brass material will not fracture or shear when striking hard surfaces Classic Nuplaglas® super duty handle is made tough from thousands of strands of fiberglass encased in a proprietary resin Perfect for working in volatile environments Hydrates and moisturizes for all day comfort Extra soft Advanced air pocket design features internal noise blocking fins Rounded flanges tapered shape fits better in the ear canal Firm stem facilitates easy insertion and removal Four flange profile creates better seal in the ear canal Less pressure in the ear canal eliminates that “plugged up” feeling