Brass Knuckle® Spectrum Glasses Fight Lens Fog Indoors or Out

June 25, 2024

Varied lens colors have matching temple color for stylish pop

CLEVELAND—Fogging lenses can strike in both indoor and outdoor working conditions. Brass Knuckle® Spectrum (BKFLEX-4040N) eye protection has options to fight fog no matter where work has to get done. This powerful ANSI Z87.1+ protection weighs less than one ounce, and the rimless lenses are manufactured with exclusive BK-Anti-FOG protection. Spectrum pops with color, too, as each lens color in the family sports a unique, corresponding temple color.


Temperature changes, humidity, sweat, rain, and moisture all contribute to lens fog. Spectrum Clear Lens allows maximum light transmission, indoors or out, without changing or distorting vision or colors (91% of light passes through). Spectrum Smoke Lens provides all-over tint for normal outdoor conditions (18% of light passes through). Amber, blue, and mirrored lenses* are also available.

BK-Anti-FOG lens protection lasts 15 times longer than EN 166/168 standards. Fog is thousands of tiny water bubbles formed when air moisture condenses on lenses. BK-Anti-FOG is extreme anti-fog performance that improves both worker safety and productivity. The special coating is permanently bonded directly onto the lens surface and will not wear off or wash off. Glasses retain fog-fighting properties for a longer duration with no reapplying and no maintenance needed.

Spectrum eye protection is loaded with other features, too. Bowed, super-flex temples touch the wearer only behind the ears, eliminating all pressure points while delivering the optimal fit. The ratcheting flexible temples and second-generation PivotEase™ nose piece offer a true face-hugging design that inspires compliance. Spectrum lenses are also anti-scratch, anti-static, and UV protected.