I put my “Firebox logic” into the sheath design. Since I was planning to store mine inside the Firebox Ultra Cook Kit I wanted some cushion for both the Chef Knife and the Ultra Cook Kit and its contents. Neoprene is the perfect choice with its stretch to fit characteristics. With its pull over “hoodie” enclosure, no space is wasted.  And it allows for an easy slide-in slide-out convenience…especially when you need a place to put your knife while you’re using it.  Then when you’re finished, you simply pull the “hoodie” over the Chef Knife to lock it in place. I went for comfort when wearing the sheath on your hip with a dangler style belt loop.