Sorry about the lateness of this reply. Depending on what your use is, I would really suggest quality kydex from a local, custom manufacturer. I am left handed and have a SOG flipper with a 5" blade I like to carry because of size and the serrations. I told the kydex manufacturer exactly what I wanted, left the knife with him and in less than a day, he had made a one off outside the waist sheath that has heavy duty belt loops. Then when I showed him were I wanted to carry it he custom folded it to be closer to my body. d it has never slipped, fell or moved. I would never leave it in the heat however but for back packing, fishing, hunting, no prob, its out of the way and dependable. Suggest finding a local manufacuter who is artisan level or takes extreme pride in his work and go from there. I attached a photo just to show the quality. Every time I buy a fixed blade, no matter how high the quality, the sheath is always right handed so I end up having to get one made.
Thanks!