Navy blue baseball cap shown from the front featuring a red number 3 over white stripes like a distressed flag.

3 Truck Under Armour® Ball Cap

Navy
$31.95
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Navy blue baseball cap shown from the front featuring a red number 3 over white stripes like a distressed flag.
  • Navy blue baseball cap shown from the front featuring a red number 3 over white stripes like a distressed flag.
  • Navy blue baseball cap with a red number 3 overlapping white horizontal stripes, resembling a distressed American flag.
  • Navy blue baseball cap at an angle, displaying a red number 3 over white horizontal stripes, resembling a distressed US flag.
  • Back view of a navy blue Under Armour baseball cap with a white DIA logo and a silver buckle.
3 Truck Under Armour® Ball Cap

3 Truck Under Armour® Ball Cap

$31.95
ColorNavy

Find Your Fit: Sizing Made Easy

TOPS

DIA Men/Unisex Top Sizing
DIA Women Top Sizing

HATS

One Size Fits Most: 6 1/2" - 7 5/8"

*Size charts provided by garment manufacturers

FAQS

PRODUCT INFO

Our apparel has a tailored fit, so if you're between sizes we recommend sizing up. If your order doesn't fit the way you'd like, just let us know and we'll take care of you with an exchange.
Our customers love the quality and design of our shirts and prints. If anything doesn't meet your expectations, just let us know and we'll make it right.

ORDERS & RETURNS

We offer an unconditional 30-day money-back guarantee. If you're not happy with your purchase, just contact us within 30 days of delivery and we'll refund 100% of your money, including shipping. We'll even cover the cost to send it back. Get in touch at support@diaapparel.com.
We're happy to help with exchanges within 30 days of delivery. Just make sure the item is brand new, unused, and unworn. Email us at support@diaapparel.com and we'll send you a prepaid return label. Once we receive your return, we'll get your exchange order placed. Please note that custom, special ordered, and discontinued items can't be exchanged.
When your order arrives, take a moment to inspect it. If you find anything damaged, defective, or incorrect, just get in touch with us at support@diaapparel.com within 30 days and we'll send you a replacement at no charge.

SHIPPING & CUSTOMER SERVICE

We ship most orders within 3–5 business days. You'll get free standard shipping on orders of $50 or more. We can also deliver to APO/FPO/DPO addresses, but we don't currently ship internationally.
We're a small, mission-driven brand and we stand behind every order. If anything isn't right, reach out to us at support@diaapparel.com and we'll make it right.

ABOUT DIA APPAREL CO.

DIA specializes in apparel and merchandise that celebrate American values, military heritage, veteran pride, and the pursuit of personal greatness.
DIA Apparel serves veterans, active-duty military, first responders, and anyone who values American freedom, personal accountability, and unapologetic patriotism.
DIA offers a wide range of apparel including t-shirts, hoodies, hats, and caps spanning military memorial designs, veteran tributes, and patriotic statements.
Yes. DIA regularly donates portions of proceeds from specific designs to veteran charities, first responder organizations, mental health support foundations, and causes supporting deployed servicemembers and their families.
DIA's core mission is to inspire personal greatness, self-reliance, and unwavering patriotism. The brand champions individual freedom, rejects mediocrity, and celebrates the strength found in discipline and courage.
Yes, extensively. DIA features memorial designs for the Kabul 13, the men of FDNY Ladder 3 (9/11), Medal of Honor recipients, Vietnam veterans, and deployed servicemembers. Many include charitable giving to support families and survivors.
Key themes include personal sovereignty, honoring sacrifice and service, pursuing freedom and independence, military pride across all branches, and the importance of self-reliance.

🛡️ The Ironclad Guarantee: Free exchanges & zero-risk returns.

NOT JUST APPAREL /// A STATEMENT
A Tribute Worn with Purpose

By DIA Apparel Co.

September 11, 2001 changed the world forever.

In the smoke and chaos of that morning, a group of men made a choice that defined heroism. The firefighters of Ladder Company 3 didn’t retreat. They kept climbing, knowing the risk, refusing to abandon the civilians trapped above.

This hat honors their final stand. A simple but powerful reminder of courage without compromise. Men like Captain Paddy Brown, a Marine Veteran and the commanding officer of Ladder 3, who refused the order to evacuate. His last words still echo:
“I refuse the order… I’m not leaving them.”

They didn’t die looking for glory. They died doing the job, because that’s what real heroes do.

Wear this hat to remember them. To honor their names. To remind the world that true bravery means going up when everyone else is going down.

Proceeds from this hat support first responder charities and the families of those who gave everything on 9/11.

Never forget. Always heading up.
Care & Maintenance

• Wash with cold water
• Air dry
Fit & Feel

Elevate your performance and style with this classic dad hat from Under Armour®, designed for comfort and durability. The built-in HeatGear® sweatband wicks away moisture, making this hat ideal for hot summers and dynamic workouts.
Product Materials

• 65% polyester, 35% cotton
• Embroidered Under Armour® label on the left side
• Unstructured, 6-panel, low-profile
• Curved visor
• Adjustable cloth strap closure

THE DIA STANDARD

PURPOSE DRIVEN MISSION

A portion of every purchase directly supports Veteran & First Responder non-profits.

THE IRON CLAD GUARANTEE

Love your gear or get a 100% full refund. No friction. Zero hassle.

Buy with Confidence

Hassle-Free Exchanges & Returns

Veteran Crafted

100% original gear, created from scratch by Veterans.

EVERY DESIGN INSPIRED BY GREATNESS.

Complete Your Loadout

WEAR YOUR CODE

CONTINUE THE MISSION

GEAR BUILT FOR YOUR STORY, YOUR COUNTRY, AND THE VALUES YOU STAND FOR.

Bearded man in a sunny desert, wearing a black "KABUL 13" t-shirt with a red DIA logo on the left sleeve.

BEST SELLERS

A bold, black triangular emblem with a small white star centered in the bottom inner point

NEW ARRIVALS

Man in a red-walled setting with "TAKE BACK FREEDOM" text, wearing a white Abraham Lincoln "ANARCHIST" t-shirt.

DEMAND BETTER

Donald Trump with a raised fist and blood on his face, surrounded by security against a red and black bullseye.

Stand Up for Yourself