16 MRC Layers 

Increases light transmission to 99.4% and creates a protective layer that's structurally harder than the glass

Nano Coating Layers

Our breakthrough nanotec® Nano Coating layer repels dirt, water and other elements by beading rather than absorbing, making it easier (and faster) than ever to clean

3.1mm SCHOTT B270

SCHOTT Ultrawhite B270 optical glass made in Germany

Tracking Frame

Full traction texture around the entire circumference of the X4 makes it easier than ever to get off and on securely

Weather-sealed

Built to withstand extreme wind, salt water, dust and other abrasive conditions and elements

25 Year Warranty

We stand behind each X4 ND to be free of defects in craftsmanship for 25 years, but they’ll easily last 50+ with proper care