Elastic trouser blousers (also called boot blousers) are an excellent choice for those who find metal blousers uncomfortable or abrasive. Hold the two bands parallel and wrap one twice around the other so they cross in the middle; take the ends of one of the bands and loop them around each other twice; then hold the four end (two in each hand) and tug to form a knot. This creates an “X” shape with each side having a hook and a loop, allowing you secure the bands in the front and back (or on the left and right). Or you simply loop two bands around each shin and hook them in place to guarantee a bloused trouser leg that will stay bloused.
Bloused trousers are required with the Army Combat Uniform and Maternity Work Uniform if the trousers are not tucked into the boots. They’re also authorized when boots are worn with the Army Service Uniform, but only Special Forces, Airborne, Ranger, Air-Assault, and Military Police personnel are authorized to wear boots with the ASU. Bloused trousers are never worn with the Dress variation of the ASU.
The Navy requires the Navy Working Uniform trousers to be bloused so that the top three of the boot's eyelets are covered, while the Marine Corps regulations simply state that the trousers of the Marine Corps Combat Utility Uniform are to be "bloused in a neat uniform manner."