Improved Hot Weather Combat Uniform
The Improved Hot Weather Combat Uniform is the latest release in approved utility uniforms for the U.S. Army. Developed for combat troops deployed in hot climates, the IHWCU makes several modifications to the ACU in materials and construction.
The most noticeable of the changes includes removal of the breast pockets, replacement of the front zipper closure with buttons, and the shoulder sleeve pockets have been replaced by top-flap pockets with horizontal button closures instead of vertical zippers.
"The IHWCU enhances Soldier performance and safety in hot and wet weather environments. The material and design provide faster drying time, improved comfort, and enhanced breathability." AR 670-1 4-4 a.
As of 1 June 2019, all Soldiers are authorized to wear the IHWCU. Some SDF components have not approved the IHWCU for wear, so make sure you check with your Chain of Command for authorization before purchasing.
DA PAM 670-1 4–4. Materials
c. The fabric of the IHWCU is 57-percent nylon and 43-percent cotton. Material is no melt, no drop.
a. Authorization for wear. The IHWCU is an authorized item. Commanders will not require Soldiers to purchase or wear the IHWCU, unless it is issued through the organizational clothing and individual equipment system.
b. Improved Hot Weather Combat Uniform enhancements. The IHWCU enhances Soldier performance and safety in hot and wet weather environments. The material and design provide faster drying time, improved comfort, and enhanced breathability. The IHWCU is a unisex uniform that should not be dry cleaned, starched, or bleached.
c. Composition. The IHWCU consists of the following:
For the purposes of this guide, we are treating the IHWCU the same as the ACU in regards to composition, wear, and fit. Both the AR 670-1 and DA PAM 670-1 make no distinction between the two styles of Combat Uniform, other than to say that pieces of the IHWCU should not be mixed with pieces of the ACU, meaning you shouldn't wear IHWCU trousers with the ACU coat, or vice versa. Beyond the coat and trousers, however, all other components of the ACU and IHWCU are identical.