DYE i4/i5 Thermal Lens - DYEtanium 2D Sphere Smoke/Northern FireOriginal style and personality. The lens for the ones who like to shake things up. DYE developed the newest lens coating technology "2D" to allow for further individualization. This second generation coating and process allows for unique coatings to be applied to the lens creating a contrast for a standout, one of a kind look. The DYEtanium Lenses for the i4 i5 Goggles set the standard in optics and allow you to improve your vision on the field with