If you're at all like me, you've probably acquired a lot of sharp things that, for one reason or another, don't have sheaths. The volume of these means that getting nice leather or kydex made for them represents a significant cost that just isn't feasible. I just recently hit on a solution that I've been absolutely giddy about: root barrier sheeting. It's UV-treated high-density polyethylene (HDPE). Available in rolls of varying dimensions and with a degree of flexibility and cut resistance equal to leather roughly 3x its thickness by my estimation, and dirt cheap. 20 square feet in 30 mil thickness (about that of a credit card) was $18 shipped to my door. It's ductile in temperatures down to -90° F and melts at 250° F, and can be heated with a heat gun at 240° to give it some mild stretch and formability like wetted leather. Because it's not a woven material, it doesn't need the edges hemmed, and because it's a polymer it's highly weather resistant. Not the prettiest stuff in the world, but using a weltless compression rivet arrangement I was able to knock this lightweight and durable sheath in about 5 minutes. I'm gonna' be covering ALL THE THINGS with it.