DEKEL (which roughly translates to "lid" from Slovak slang) is a great way to prevent carbon building up on your flashlight lens as well as getting rid of those pesky reflections and light NDs.
If you are not sure which DEKEL size you need just measure the diameter of your flashlight head and compare it with the available sizes - for example DEKEL31 has inner diameter of 31mm, so it is best used on lights with head diameters up to 31mm.
Everything you need is included in the package - DEKEL of your choosing, bungee cord and a ranger band.
