The sheaths, which is made of natural leather, is impregnated with heat, so that the preservative penetrates deeply. Sometimes, however, it is good to wipe them with a special fat or, for example, impregnation for trekking shoes. The face will regain its glow and will not dry out.
-Kydex (from which also sheaths are made)
is a thermoformable plastic and requires no maintenance-