When choosing a holster, you should avoid material that wears out – for example, leather. When your holster wears, it loses its shape, and most importantly, worn material can come into contact with the trigger when repositioning the firearm, which in turn can cause an unwanted shot.
Depending on the field of use, the security level of the holster must be considered. Police officers wear holsters with a higher level of security that prevent outsiders from removing their weapon from the holster. An ordinary user who carries a weapon concealed might prefer a holster with security level 1, so that it can be retrieved as easily as possible.