Authentic U.S. Army Combat Shirt (ACS) manufactured by Massif Mountain Gear Company, issued during the ACU era and designed for wear under body armor in combat environments.

These shirts feature a flame-resistant (FR) construction, combining a lightweight, moisture-wicking torso with durable NYCO ripstop sleeves in ACU digital camouflage. The design helps reduce heat buildup under plate carriers while maintaining durability where it matters.

Each shirt includes functional sleeve pockets with hook-and-loop panels for patches and IR (infrared) identification tabs used in military applications. Some examples may also feature the U.S. Army logo printed on the chest, depending on production run and contract.

Massif is a trusted U.S. military contractor known for high-quality FR gear, making these shirts a solid option for tactical use, workwear, training, or collection.