Sperian Protection and IBT

The Sperian Protection Group designs and manufactures personal protection equipment (PPE) including electronic noise attenuation helmets, ear muffs and single-use or re-useable ear plugs under brand names that have become benchmarks on their market: Bilsom and Howard Leight.

The Ultimate in Safety & Protection

Your workers need the right level of protection. Not enough and they’re vulnerable to hearing damage. Too much and they become isolated from their environment. That’s why we offer a range of attenuation levels, each suited to different users, different environments. Whatever the situation demands, turn to Bilsom for the most innovative earmuffs in the industry.

Patented High Performance Technology

Bilsom’s new patented Air Flow Control™ technology delivers optimal attenuation across all frequencies, without increasing earcup size or weight. As sound travels through the air in the earcup, a patented baseplate chamber and high-tech non-woven layer inside the ear cushion manage the flow of air and controls how sound reaches the ear. The result is better, more consistent overall attenuation for almost all industrial noise environments. Air Flow Control is a standard feature on all Leightning and Thunder series earmuffs.

Advanced Sound Management Technologies

What’s our latest breakthrough in acoustic technology? Clarity™ Noise Filtering. Clarity technology blocks harmful noise while the human voice and other important sounds can be heard more naturally.

Quick-Click Height

Quick-Click height adjustment allows easy fit adjustment that stays in place.

Multiple Positions

Multiple wearing positions gives you the most options for use with helmets, respirators, shields and other equipment.