Even with the best knives, the sheaths that come with them are frequently shockingly bad designs. Sometimes downright crap materials. Given that I'd expect to see a booming aftermarket in knife sheaths. But not so much. Many leather workers and some holstermakers do knife sheaths as well, but usually only on custom order. Same with Kydex sheaths. Bladetech will make you a sheath... if you send them your knife. I'd like a good Kydex sheath with an outer layer of Cordura for many of my knives, but it's really hard to find anyone who does that kind of work. I may have to learn to just do it myself.