Army Regulation 670-1 (AR 670-1) and Department of the Army Pamphlet 670-1 (DA PAM 670-1) govern the wear and appearance of the Army Service Uniform (ASU). As of 2026, these regulations define the Blue ASU as the primary formal dress uniform, ensuring all Soldiers maintain a professional, disciplined image that honors the heritage of the United States Army.
The Role of the ASU in the 2026 Army Uniform Inventory
The landscape of Army uniforms has stabilized significantly by 2026. For several years, the transition from the "Universal" Blue ASU to the Army Green Service Uniform (AGSU) has redefined how Soldiers dress for different occasions. Under current AR 670-1 guidelines, the AGSU serves as the primary "daily" service uniform for office environments, recruitment, and typical garrison duties.
In contrast, the Blue Army Service Uniform (ASU) has reclaimed its role as a formal and semi-formal garment. It is the uniform of choice for social functions, official ceremonies, and events where "Dress Blues" are traditional. While the AGSU is for business, the Blue ASU is for the "Black Tie" or "Formal" equivalent in the military world. Understanding the nuances of AR 670-1 as it pertains to the ASU is critical for NCOs and Officers who must lead by example in ceremonial settings.
Core Components of the Male Blue ASU
The male ASU is a multi-part system designed for modularity, allowing it to transition from a Class B (no jacket) to a Class A (with jacket) or a Dress Blue (with bow tie) configuration.
The ASU Coat and Trousers
The coat is a dark blue, four-button, peak-lapel design. AR 670-1 requires the coat to fit loosely enough to allow for movement but snugly enough to prevent bunching. The sleeve length must extend to one inch below the center of the wrist bone.
The trousers vary based on rank. Junior enlisted Soldiers (Private through Specialist) wear sky-blue trousers without a stripe. Non-commissioned Officers (Corporal through Sergeant Major) and Officers wear sky-blue trousers with a 1.5-inch gold braid sewn onto the outside seam of each leg. The fit of the trousers is specific: they should reach the top of the instep in the front and be cut on a diagonal to reach a point midway between the top of the heel and the top of the shoe in the back.
The Service Shirt and Neckwear
The standard shirt is a long-sleeved or short-sleeved white polyester/cotton blend. It features shoulder loops for the attachment of enlisted rank or officer shoulder boards.
For the neckwear, the regulation specifies:
- Four-in-hand necktie: Required for Class A and Class B configurations during normal duty hours or semi-formal events.
- Bow tie: Required when the ASU is worn as a "Dress Blue" uniform for formal social functions after retreat. The bow tie must be black silk or a silk-like fabric.
Core Components of the Female Blue ASU
The female ASU offers more variety in configuration, specifically regarding the choice between slacks and the service skirt.
The ASU Coat, Slacks, and Skirt
Like the male version, the female coat is dark blue. However, it is tailored specifically for the female form, featuring a single-breasted, four-button design without breast pockets. The sleeve length matches the male requirement of one inch below the wrist bone.
- Slacks: These are sky-blue. NCOs and Officers have a 1-inch gold braid on the slacks, which is narrower than the male version.
- Skirt: The skirt provides a more formal aesthetic for ceremonies. It must fall between one inch above and two inches below the center of the knee. AR 670-1 mandates that sheer or skin-tone stockings be worn with the skirt.
The Neck Tab
Instead of a necktie, female Soldiers wear a black neck tab. In 2026, the regulation remains strict on the positioning: it must be worn with the white long-sleeve or short-sleeve shirt when the coat is worn. For the Class B configuration, the neck tab is optional with the short-sleeve shirt but required with the long-sleeve shirt.
Precise Insignia and Accouterment Placement
The most common area for inspection failures is the placement of ribbons, badges, and nameplates. DA PAM 670-1 provides the exact measurements, often referred to as the "1/8 inch rule."
Male ASU Placement Standards
- Nameplate: Centered on the flap of the right breast pocket, between the top of the button and the top of the pocket.
- Ribbons: Centered 1/8 inch above the left breast pocket. They must be worn in order of precedence.
- Service Stripes: Worn on the left sleeve, centered at a 45-degree angle. Each stripe represents three years of honorable service.
- Overseas Service Bars: Worn on the right sleeve. Each bar represents six months of service in a designated combat zone.
- Unit Awards: Centered 1/8 inch above the right breast pocket flap.
- Regimental Distinctive Insignia (RDI): Centered 1/8 inch above the top of the unit awards or 1/4 inch above the nameplate if unit awards are not worn.
Female ASU Placement Standards
Because the female coat lacks breast pockets, measurements are taken from the "imaginary line" or natural landmarks on the coat.
- Nameplate: Centered on the right side, between 1 and 2 inches above the top button.
- Ribbons: Centered on the left side, with the bottom row parallel to the bottom of the nameplate.
- Unit Awards: Centered 1/2 inch above the nameplate.
- Marksmanship Badges: Centered 1/4 inch below the ribbons. If multiple badges are worn, they are spaced 1/2 inch apart.
Comparison of Male and Female ASU Requirements
| Feature | Male ASU Standard | Female ASU Standard |
|---|---|---|
| Trousers/Slacks Braid | 1.5-inch gold braid (NCO/Officer) | 1-inch gold braid (NCO/Officer) |
| Nameplate Placement | Centered on right pocket flap | 1-2 inches above top button |
| Neckwear | Four-in-hand tie or Bow tie | Black neck tab |
| Headgear | Service Cap or Beret | Service Hat or Beret |
| Footwear | Black Oxford / Low-quarters | Black Oxford or Pumps |
| Sleeve Length | 1 inch below wrist bone | 1 inch below wrist bone |
Headgear, Footwear, and Accessories
The Service Cap and Beret
The Maroon, Tan, Green, or Black Beret remains the primary headgear for the ASU in most units. It must be worn level on the head, approximately one inch above the eyebrows, with the flash centered over the left eye.
The Service Cap (Male) and Service Hat (Female) are highly encouraged for formal events. The Service Cap features a gold chin strap for Officers and a black synthetic leather strap for enlisted Soldiers. In 2026, many units mandate the Service Cap for formal change of command ceremonies or funerals to maintain a higher state of military bearing.
Footwear Regulations
Soldiers must wear black Oxford-style shoes (low-quarters). They must be kept highly shined unless they are made of a patent leather material (poromeric), which is permitted for the ASU. For females, black pumps are authorized for wear with the skirt or slacks, provided the heel is between 1/2 inch and 3 inches high and the sole is no thicker than 1/2 inch.
The "Gig Line" and Appearance
The "gig line" is the alignment of the seam of the shirt, the edge of the belt buckle, and the fly of the trousers. AR 670-1 emphasizes that this line must be straight. A crooked gig line is one of the most immediate indicators of a lack of attention to detail during a uniform inspection.
Grooming and Personal Appearance Standards
A uniform is only as good as the person wearing it. AR 670-1 includes extensive sections on grooming that are inseparable from the wear of the ASU.
Hair Standards
As of 2026, the Army has continued to refine hair standards to be more inclusive while maintaining a professional look.
- Males: Hair must have a tapered appearance and not touch the ears or the collar. Sideburns cannot extend below the bottom of the ear opening.
- Females: Multiple hairstyles are authorized, including ponytails and braids in all uniforms, provided they do not interfere with the proper wear of headgear. However, for formal ASU events, many Soldiers opt for a neat bun or a secured braid to ensure the highest level of formality.
Jewelry and Tattoos
- Jewelry: The only authorized jewelry in the ASU includes a wedding band, one other ring, and a wrist watch. Females may wear stud earrings (gold, silver, or diamond) not exceeding 1/4 inch in diameter.
- Tattoos: The Army's tattoo policy remains centered on "decency and professionalism." Tattoos on the hands (one per hand, limited size) and a neck tattoo (one, limited size) are permitted, but face tattoos remain prohibited.
Maintenance and Preservation of the ASU
The ASU is an investment. Because it is used less frequently than the AGSU or the Combat Uniform (OCP) in 2026, proper storage is essential.
- Dry Cleaning: The coat and trousers must be dry cleaned. Excessive washing of the white shirt can lead to yellowing; using a high-quality undershirt can help mitigate sweat stains.
- Storage: Always hang the ASU on a wide, contoured hanger to maintain the shape of the shoulders. Use a breathable garment bag to prevent dust accumulation.
- Brass and Metallic Items: Ensure all brass, such as U.S. insignias and branch insignia, are polished or replaced if they become scratched. Many Soldiers in 2026 prefer "no-polish" stay-bright insignias, but these must be checked for chips in the finish.
Common Mistakes to Avoid
- Incorrect Ribbon Order: Always use an updated "Order of Precedence" chart. National awards always outrank state or unit awards.
- Improper Beret Shape: A "chef's hat" look with the beret is a common violation. The excess material must be pulled down to the right, touching the top of the ear but not draping over it.
- Mismatched Metals: Mixing "stay-bright" (shiny) brass with dull, polished brass is a violation of the uniformity principle.
- Ignoring DA PAM 670-1: Many Soldiers only read the AR (policy) and skip the PAM (the technical manual). The PAM contains the actual measurements required for a perfect score on an inspection.
Summary of Next Steps for Soldiers
To ensure your ASU is ready for the next formal event or board, follow these steps:
- Verify your current rank and awards against your Soldier Talent Profile (STP).
- Download the latest version of DA PAM 670-1 from the Army Publishing Directorate.
- Layout your uniform 72 hours before the event to identify any missing items or required dry cleaning.
- Use a ruler or a specialized uniform tool (like an EZ-Rack) to ensure all 1/8 inch and 1/4 inch measurements are exact.
Frequently Asked Questions
Can I wear the Blue ASU for everyday office work in 2026?
While AR 670-1 allows the ASU to be worn as a service uniform, the Army Green Service Uniform (AGSU) is the designated "daily" business uniform. The Blue ASU is generally reserved for formal occasions, ceremonies, or when specifically directed by the Chain of Command.
Are umbrellas authorized while wearing the ASU?
Yes. Soldiers may carry or use a plain black umbrella only when wearing the Service (ASU/AGSU), Dress, and Mess uniforms. Umbrellas are not authorized with the OCP (Combat Uniform).
Is the wear of the "Full Dress Blue" configuration still authorized?
The Full Dress Blue configuration, which includes the wear of medals instead of ribbons, is authorized for specific formal social functions. When wearing large medals, ribbons are not worn on the opposite side.
How do I know if I should wear the four-in-hand tie or the bow tie?
The four-in-hand tie is for "Service" or semi-formal wear (Class A). The bow tie is specifically for "Dress" functions occurring after retreat (usually 1700 hours) or for formal dinners (Dining-In/Dining-Out).
Can I wear my unit patch on the ASU?
No. The ASU does not feature the Tactical Shoulder Sleeve Insignia (unit patch) on the sleeves. Unit affiliation is shown through the Regimental Distinctive Insignia (RDI) above the right pocket and the Unit Awards.
