ACU
ACU is known as Army Combat Uniform or Airman Combat Uniform, it takes many months of research and development to combine with different Camouflage Patterns and Colors, and make soldier can blend into the landform on the battlefield to avoid being discovered by the enemy to protect soldiers from casualties. It enhances Soldier performance by providing a uniform that is tailorable to the individual mission; provides enhanced functionality and ergonomics and does away with requirements to procure uniforms focused on specific environments. Normally ACU is include Shirt and Trousers, but some countries will wear cap together.
The ACU shirt originally used hook-and-loop-backed attachments to secure items such as name tapes, rank insignia, and shoulder patches and tabs, as well as recognition devices. And ACU trousers (or ACU pants) are worn with a two-inch nylon web belt, and feature Velcro pouches for knee pad inserts, two forward-tilted thigh storage pockets with elastic drawstring and Velcro for closure during movement, and two calf storage pockets one on each pant leg with a Velcro closure.