I have a small GEC pocket slip I use for my GEC knives, but it bothers me a bit. I use it to preserve the look and finish of my Viper or my Mustang or Talon when I carry them.
I get conflicted. My knife is supposed to be a tool, but I like keeping my newer traditional knives looking nice and not scratched up.
However if I had to produce and open my knife quickly for some emergency situation I have just added another step to getting the blade out. For cutting an apple, take all the time you want. A large aggressive looking rotwieller dog charging me in the woods at the local off leash dog park,,not the time to be fumbling around. "Hang on their Fido, just let me get this out of my pocket sheath and then we are good to go."
And yes in the last 10 years I have encountered unleashed, uncontrolled 85+ lbs dogs like this more than once unfortunately.
Also I carried a Victorinox Alox Soldier for years and years. The idea of a pocket sheath never even came to mind. If something happened to the knife I could buy another one just like it locally at many shops. It is not disposable, and it will always be a personal favourite just due to the amount of time it was carried and used but it is not irreplaceable in a physical sense. Get it all tarnished and marked up. No problem.
But my GEC SFO Talons or my Viper, once they are gone,,,well they are gone.
Oh what a tangled web I have woven for myself with this collecting. I need to drop the sheath in the New Year.
,,,Mike in Canada