Kydex® is a thermoplastic acrylic-polyvinyl chloride material manufactured by Kydex, LLC. It has a wide variety of applications including firearm holsters and knife sheaths. The material is also widely used in the aircraft and medical industries. For holster applications it proves to be an excellent alternative to leather holsters. Advantages include a low friction, waterproof, scratch resistant finish with a Rockwell “R” hardness of 90. Kydex® holds it shape better than nylon and leather and will not stretch or shrink under normal conditions.