The Fenix red filter can be easily attached to the Fenix flashlights TK10, TK11, TK12, TK15, TK16, TK20 and TK20R, TK20R V2.0, PD40R V3.0 as well as the Wolf-Eyes Dingo headlamp.
It is made of anti-reflective glass and Bayer PC 2805 Makrolon, among other materials.
It is designed so that the flashlight cannot roll away (anti-roll design).