Short answer: On a military-style shirt, epaulettes (the buttoned straps on the shoulders) were originally there to carry rank insignia and help keep gear straps from sliding off the shoulder, while button-flap chest pockets keep small items from falling out when you bend, climb or crawl. On a civilian shirt today, the flap pockets still do real work every day; the epaulettes are mostly about structure and style.
Military-style shirts are one of the most copied designs in menswear, and most guys who wear them have never been told what the details are for. That matters, because once you know which features are functional and which are decorative, it gets a lot easier to pick the right shirt for how you actually spend your day. This guide walks through each detail, where it came from, and whether it earns its place on a shirt you wear to work, on the trail or around town.
If you are trying to figure out what separates a "tactical" shirt from a regular button-up, we covered that in What Makes a Shirt "Tactical"?. This article is narrower: it is about the heritage details of the classic military field shirt.
What are epaulettes on a shirt for?
Epaulettes started as ornamental shoulder pieces on 18th- and 19th-century dress uniforms, where they showed an officer's rank at a glance. As uniforms became more practical, the fringed versions gave way to simple fabric shoulder straps (often called shoulder loops or shoulder boards), and those straps took on two jobs:
- Rank display. Rank slides or boards could be slipped onto the strap and moved between shirts.
- Strap management. A buttoned strap could hold a cross-body strap, a folded cap or a pair of gloves in place against the shoulder.
Do epaulettes do anything on a civilian shirt?
Honestly, not much. They add a little visual structure across the shoulders, which makes a shirt look squarer and more deliberate, and they are the single detail that most clearly reads as "military style." Some people use them to keep sunglasses or a rolled bandana from sliding around, but nobody should buy a shirt because of what the epaulettes can carry. Treat them as a style signal, and judge the shirt on its fabric, fit and pockets.
Our Long-Sleeve Tactical Outdoor Shirt is a good example of the full heritage look: the product photos show buttoned shoulder epaulettes and two button-flap chest pockets, and the fabric is a polyester-rich quick-dry weave rated for roughly 60–85°F.
Why do military shirts have flap pockets?
This is the detail that still pays its way. An open patch pocket is fine when you are standing upright. The moment you lean over a truck bed, kneel to tie a boot or scramble up a bank, whatever is in that pocket wants to slide out. A flap with a button closes the top of the pocket, so your phone, a pen, a folded map or your reading glasses stay put.
Flaps also help in two less obvious ways:
- They keep debris out. Sawdust, leaves, grass seed and rain fall into an open pocket. A flap sheds most of it.
- They keep the front looking neat. A flap hides the shape of whatever you are carrying, so a full pocket looks less lumpy.
What is the pleat in the middle of the pocket for?
Many military-style chest pockets have a vertical box pleat sewn down the center. It lets the pocket expand when you load it and lie flat when it is empty. It is a small detail, but it is the difference between a pocket that fits a phone and one that strains against it.
You can see both features on our Military-Style Cotton Shirt, a short-sleeve shirt in 100% organic cotton with dual chest pockets, each with a buttoned flap and a center pleat. The spec sheet lists it for urban commute, light trekking, travel and everyday wear.
Flaps vs. zip pockets: which is more secure?
A zipper is more secure than a button flap. It fully closes the opening, so nothing escapes even if you are upside down. The trade-off is speed: a flap is quicker to open one-handed, and it does not leave a zipper pull rattling against things. If you regularly carry something you cannot afford to lose, like a key fob or a passport, look for at least one zip pocket. We compared the options in more detail in Chest Pocket Layouts on Work Shirts.
What other military details show up on these shirts?
- Structured collar. A collar that holds its shape keeps the shirt looking sharp when worn open over a tee, and covers the back of the neck from sun.
- Roll-up sleeves with a button tab. Field shirts were designed to go from full coverage to rolled sleeves without the roll slipping down. On our long-sleeve tactical shirt, the cuffs can be secured or rolled, and the product photos show a button tab holding the roll.
- Reinforced stitching at stress points. Pocket corners and seams take the most strain, so heritage-style shirts usually double-stitch them.
- Earthy colors. Olive, khaki, navy and sand trace back to uniform palettes, and they also hide dirt better than bright colors.
Which details matter for how you actually wear it?
| Detail | Original purpose | Useful today? | Who benefits most |
|---|---|---|---|
| Shoulder epaulettes | Rank insignia, holding straps | Mostly style | Anyone who likes the heritage look |
| Button-flap chest pockets | Keep contents in during movement | Yes, every day | Workers, hikers, anglers, travelers |
| Box-pleated pockets | Extra capacity | Yes | Anyone who carries a phone in a chest pocket |
| Roll-up sleeve tab | Hold rolled sleeves in the field | Yes | Days that start cool and warm up |
| Structured collar | Neat appearance, neck coverage | Yes | Sun exposure, wearing the shirt open |
Cotton or quick-dry: which fabric should a military-style shirt be?
The look is the same, but the fabric decides where the shirt works best.
- Cotton feels soft, breathes well in dry weather and looks right in town. It absorbs sweat and dries slowly, so it is best for lower-effort days. The Casual Outdoor Field Shirt is a long-sleeve, cotton-rich option with flapped utility chest pockets and a structured collar, listed for roughly 50–80°F.
- Polyester-rich quick-dry fabrics move moisture off the skin and dry faster, which is what you want for hot, sweaty or high-output days. That is where the long-sleeve tactical shirt above fits.
If you prefer the silhouette without the extra hardware, the Core-Canvas Essential Cotton Shirt keeps a military-inspired cut with a single chest pocket and no loud branding. Note that it is a short-sleeve shirt despite the military styling.
Browse more options in our Tactical & Work Wear collection or the Cotton Field Shirts collection.
How should a military-style shirt fit?
Military-style shirts look best when the shoulder seam sits right at the edge of your shoulder, which also lets the epaulettes lie flat instead of bunching. Check the chest pockets with your usual load in them: if the button-front pulls into horizontal creases, the shirt is too tight.
Our shirts run on the small side compared with typical US work shirts, and the chest is where most people run out of room. Measure your chest against the size chart on the product page, and if you land between two sizes or want to layer over a tee, size up one.
Frequently asked questions
What are the straps on the shoulders of a shirt called?
They are called epaulettes, also known as shoulder straps or shoulder loops. On military uniforms they carried rank insignia and helped hold gear straps in place. On civilian shirts they are mostly a style detail.
Why do military shirts have two chest pockets with flaps?
Button flaps keep small items from falling out when you bend, kneel or climb, and they keep debris and rain out of the pocket. Two pockets spread the load so the shirt hangs evenly.
Is a military-style shirt the same as a tactical shirt?
Not exactly. A military-style shirt borrows heritage details like epaulettes and flap pockets. A tactical shirt is defined more by function, such as quick-dry fabric, stretch, and zip or concealed pockets. Some shirts combine both.
Can you wear a military-style shirt to work?
Yes. In muted colors like olive, navy or khaki, with the shirt tucked in or worn neatly untucked, it reads as a smart casual work shirt. The flap pockets are practical for pens, a phone and ID.
Should I size up in a military-style shirt?
If you are between sizes or plan to layer, yes. Our shirts run small, especially through the chest, so check the size chart and go up one size when in doubt.
Want the look with pockets that actually work? Start with the Military-Style Cotton Shirt for warm days or the Long-Sleeve Tactical Outdoor Shirt for sun and sweat, or browse all men's shirts.