Here are the pictures from the Ka-Bar website. Its called yhe last ditch knife. Its only $22. Its small byt always there when you need it and it is so lite I forget it is there and the way the holster laces in it stays on the boot so I dont have to take it off and on.
Ive got a small knife with a polymer holster made by Ka-Bar. The holster has holes where you lace it up in yoyr boot laces. I forget it is there all the time. It is that light and comfortable. Its small but always there when I need it.