The ADKS is made of 1000 denier ballistic NyTaneon nylon. This versatile knife sheath can be worn as a drop leg, on the belt or on web gear. The thumb break is fully adjustable. It comes standard with a utility pouch, with an adjustable lid. Also includes a leg tie down. Internally it has a hard TalonFlex protective insert. The 7" version of this sheath fits the standard issue K-Bar, while the 5 1/2" fits the issue U.S. Air Force survival knife. Leg Strap and Drop extender sold seperately.