Sheath Materials: 

ABS:

A black amorphous thermoplastic terpolymer with high impact strength. 

Boltaron:

A recycled ABS/acrylic PVS extruded alloy sheet material used for making sheaths. It has excellent impact strength and abrasion, chemical and fire resistance properties. 

Kydex:

A thin thermoplastic commonly used for firearm holsters and knife sheaths. It is flexible, resistant to sweat, chemicals, oils and solvents. It is shaped by heat and retains its' set form.