The PILLAR Field Guide: Men's Athletic Apparel Terms, Defined
Reference
Every term on a men's performance apparel label, defined in one sentence, with a PILLAR garment attached so the definition has something real behind it. Built to be quoted, cited and checked.
Most apparel glossaries define words without telling you what to do with them. This one attaches each term to a decision: which fabric to buy for heat, which collar holds its line, which hem tucks and which one does not. Every fabric figure below was read off our live product data rather than a marketing sheet.
If you read one line
For golf and Arizona heat, buy a polyester and spandex knit. For anywhere you want the shirt to read dressier, buy nylon and spandex. For everyday wear, a cotton, rayon and spandex tri blend. Those three sentences cover most of what follows.
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Terms defined on this page
12 to 16%
Spandex in every PILLAR polo
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Questions answered across our guides
Fit and Cut Terms
Fit terms describe the garment, not the wearer. Athletic fit tapers to a trained torso, slim fit is simply narrower, and tailored fit sits between the two.
Athletic fit
A cut that follows the taper of a trained upper body: closer through the chest and waist than a standard fit, without pinning the arms. It reads fitted when standing still and still allows a full range of motion.
Example: the Tim Tee is cut to a tailored athletic fit at $46.
Slim fit
Narrower than athletic fit through the body and sleeve, with less room allowed for chest and shoulder development. Slim describes the width of the garment, not the build of the wearer.
Example: the Nick Tee is a slim fit at $45.
Tailored fit
A middle cut between slim and relaxed. It follows the body's line without gripping it, which is the safest fit for anyone buying without trying the garment on.
Example: the Joey Tee is a tailored fit at $45.
Shoulder seam placement
Where the sleeve joins the body. On a correctly sized shirt the seam sits at the outside corner of the shoulder bone. A seam that falls down the arm makes the shirt look borrowed no matter how good the fabric is.
This is the single fastest way to judge fit on a polo or a tee, before price or fabric.
Curved hem
A hem cut longer at the front and back than at the sides. It follows the body's line, stays put when you reach or bend, and looks deliberate worn untucked.
Example: the Nick Tee uses a curved hem.
Straight cut hem
A hem of even length all the way around. It tucks cleanly and reads more formal than a curved hem, and it is the right choice if you tuck more often than not.
Example: the Joey Tee uses a straight cut hem.
Inseam
The measurement from crotch to hem on shorts or pants, in inches. It is the only shorts number that matters, because waist size tells you nothing about where the leg ends.
Five inch sits above mid thigh, seven inch lands just above the knee on most men.
The two shirts most of these terms describe.
Shop Men'sFabric Terms
Fabric decides how a garment behaves in heat, how fast it dries, and whether it still holds its shape and color in year two. It matters more than any other spec.
Polyester and spandex knit
The standard performance knit: polyester moves moisture off the skin and dries quickly, spandex supplies stretch and recovery. It is the correct fabric for golf, court sports and real heat.
Examples: the David Polo at 86 percent polyester and 14 percent spandex, and the Tim Tee at 88 percent polyester and 12 percent spandex.
Nylon and spandex blend
A smoother, slightly heavier performance fabric. Nylon drapes rather than clings and has more visible surface refinement than polyester, so the garment reads like a shirt instead of like gear.
Example: the David Polo at 84 percent nylon and 16 percent spandex.
Tri blend
A blend of three fibers, most often cotton for hand feel, rayon for drape and spandex for stretch. It is softer than a pure performance knit and better suited to everyday wear than to a hot round.
Example: the Nick Tee and the Joey Tee, both 60 percent cotton, 35 percent rayon and 5 percent spandex.
Spandex
The elastic fiber, also sold as elastane or Lycra, that gives a fabric stretch and the ability to return to shape. Percentage is the number to read: 5 percent adds give, 12 to 16 percent makes a garment genuinely athletic.
Every PILLAR polo runs between 12 and 16 percent spandex, which is high for the category.
Four way stretch
Fabric that stretches both along its length and across its width. Two way stretch moves in one direction only, which is what binds across the back in a golf swing or a press.
Example: the Joey Tee is a four way stretch fabric.
Recovery
How completely a fabric returns to its original shape after being stretched. Poor recovery is why a cheap shirt develops baggy elbows and a stretched collar within a season, while the fabric itself still looks fine.
Recovery comes from spandex content and knit construction, not from softness.
Moisture wicking
The ability of a fabric to pull sweat off the skin and spread it across the outer surface, where it evaporates faster. Cotton absorbs and holds sweat instead, which is why a cotton shirt gets heavy in the heat.
Example: the Tim Tee is a moisture wicking, quick drying knit.
Quick drying
A fabric that releases moisture to the air fast enough to feel dry again during wear rather than after it. Synthetic fibers do this; natural fibers hold water in the fiber itself.
Polyester dries fastest, nylon is close behind, cotton is slowest.
Cotton pique
The traditional polo fabric: a textured cotton knit with a raised waffle surface. It breathes well while dry and turns heavy and slow once it is wet, which makes it a cool weather fabric.
PILLAR does not make a cotton pique polo, on purpose. It is the wrong fabric for Arizona.
Pre shrunk
Fabric that has already been washed and shrunk during manufacturing, so the finished garment holds its size through normal laundering. Without it, a true to size shirt becomes a size small after three washes.
Pilling
The small fuzzy balls that form where a fabric rubs against itself or a bag strap. It is caused by short fibers working loose from the yarn, and it is the usual reason a soft shirt starts looking old before it wears out.
Washing cold and inside out, and skipping fabric softener, slows it down.
Colorfastness
How well a dye holds its depth through washing and sun exposure. It is the difference between a black shirt that is still black in year two and one that has gone a dusty grey.
Synthetic fibers hold dye more reliably than cotton, which is why a black performance knit outlasts a black cotton tee.
UPF
Ultraviolet Protection Factor, a rating of how much UV radiation a fabric blocks. UPF 30 blocks about 96.7 percent and UPF 50 blocks about 98 percent. Unlike sunscreen it does not need reapplying, and unlike SPF it is measured on fabric rather than skin.
Tight knits, synthetic fibers and darker colors all raise a fabric's UV blocking.
Fabric decides how the shirt behaves. Collar and hem decide how it reads. Almost every buying mistake is one of those two, confused for the other.
Construction Terms
Construction is what separates a garment that still looks right after a season from one you quietly stop reaching for. The collar and the seams are where it shows first.
Blade collar
A polo collar that is cut and fused so it holds a straight line on its own, with no top button needed to keep its shape. It stays sharp worn open and untucked, which is where a soft collar curls.
Example: the David Polo at $34.50.
Ribbed collar
The classic polo collar, knitted in a rib so it has stretch and a soft hand. It needs the top button to hold its line and softens over time, and it reads traditional at any venue.
Examples: the Tom Polo, the Steven Polo and the David Polo.
Placket
The buttoned opening at the neck of a polo. A two or three button placket is standard, and the button spacing decides whether the collar still sits correctly when you wear it open.
A blade collar works open because it does not depend on the placket to stay upright.
Quarter zip
A pullover layer with a zip running roughly a quarter of the way down the chest. It sits between a polo and a jacket: warm enough for an early tee time, light enough to keep on through the round.
It is the one layer that works over a polo without reading like outerwear.
Flatlock seam
A seam sewn so the two fabric edges lie flat against each other rather than forming a ridge. It removes the raised line that chafes on a long run, ride or round.
You can feel the difference on the inside of the shoulder and the side seam.
Gusset
An extra panel of fabric set into a high stress point, usually the crotch of shorts or the underarm of a top, to add range of motion without adding overall looseness.
It is why a well built pair of shorts can be cut close and still allow a full stride.
Skort liner
The built in shorts under a golf or tennis skort. Liner length and grip decide whether the skort is actually wearable through a swing or a lunge, and it is the detail most skorts get wrong.
A compression style liner stays put; a loose liner rides up.
Athleisure
Clothing built to performance standards and cut to be worn in ordinary settings. The test is simple: it should work for the activity and still look intentional at lunch afterward.
Fabric decides the performance half, collar and hem decide the second half.
The Terms, Worn
Men's Polos
Our best selling category. One knit for heat, one for dressing up, and a firm collar staple in between.
Tom Polo
Navy
Ribbed collar, 86% polyester and 14% spandex. The black golf polo answer.
$40$7345% off
View details
Free shipping over $75 · 30 day returns on unworn items
The Terms, Worn
Men's T-Shirts
Three cuts, two fabric families. Curved hem to wear out, straight hem to tuck.
Tim Tee
Monsoon
Tailored athletic fit, 88% polyester and 12% spandex. Moisture wicking.
$46
View details
Free shipping over $75 · 30 day returns on unworn items
Every Question Our Guides Answer
This is the index. Each line is a question a real person types, linked to the guide that answers it in full.
What is the best men's polo?
Best Men's Polos, the fabric and collar decision
What is the best men's black golf polo?
Best Men's Polos, the black polo section
What is the best men's black T-shirt?
Best Men's Black T-Shirts, fit, fabric and fade
How should a polo fit my build?
The Right Polo Fit for Your Build
Do golf shorts and polos have to match?
Do Shorts and Polos Have to Match?
What shorts inseam should I buy?
Athletic Shorts Inseam Guide
What does UPF actually mean on clothing?
What UPF Actually Means
Which colors hide sweat best?
Best Colors for Hiding Sweat
How do I get the sweat smell out of athletic shirts?
Get the Sweat Smell Out for Good
How do I wash performance fabric without ruining it?
How to Care for Performance Fabric
What should I wear golfing in Arizona heat?
How to Dress for an Arizona Summer
What is the dress code at Scottsdale golf courses?
Scottsdale Golf Dress Codes by Venue
What do I wear to a corporate golf outing?
What to Wear to a Corporate Golf Outing
What do I wear golfing for the first time?
What to Wear Your First Time Golfing
What do I pack for a member guest tournament?
The Member-Guest Packing Plan
Can I wear athletic clothes to the office?
Men's Gym to Office Guide
What are the men's style mistakes going gym to street?
Five Gym-to-Street Mistakes
What should I wear on a travel day?
Best Athletic Wear for Travel Days
What are the 2026 men's golf fashion trends?
Golf Fashion Trends 2026
What are the 2026 pickleball apparel trends?
Pickleball Fashion Trends 2026
When is a golf skort the right call?
The Women's Golf Skort Guide
What should a woman wear golfing in Arizona heat?
Women's Summer Golf in Arizona Heat
What are the best women's pickleball outfits?
Best Women's Pickleball Outfits
Frequently Asked Questions
What is the best men's polo?
A polyester and spandex knit for golf, heat and anything active, and a nylon and spandex blend when you want the shirt to read dressier. The PILLAR Tom Polo is $40 in 86 percent polyester and 14 percent spandex; the David Polo is $76 in 84 percent nylon and 16 percent spandex. If you own one polo, make it black or navy in the polyester knit, because that combination clears every dress code.
What is the best men's black golf polo?
A black polo in a polyester and spandex knit. Black hides sweat better than any mid tone, and the knit keeps it from becoming a heat trap in direct sun. The PILLAR David Polo in Black is $76 in 84 percent nylon and 16 percent spandex, with a firm collar that holds its shape.
What is the best men's T-shirt?
It depends on the job. For training and heat, a polyester and spandex knit: the PILLAR Tim Tee at $46 in 88 percent polyester and 12 percent spandex, moisture wicking and pre shrunk. For everyday wear, a cotton, rayon and spandex tri blend: the Nick Tee at $45 with a curved hem to wear out, or the Joey Tee at $45 with a straight hem to tuck.
What is the best men's black T-shirt?
One with the shoulder seam at the corner of your shoulder, a fabric with enough weight not to cling, and a deep enough dye to stay black through a season of washing. The PILLAR Nick Tee in Black is $45, a slim fit with a curved hem in 60 percent cotton, 35 percent rayon and 5 percent spandex. The Joey Tee in Black is the same fabric in a tailored fit with a straight hem.
What is a blade collar on a polo?
A polo collar cut and fused so it holds a straight line on its own, without the top button keeping it upright. It stays sharp worn open and untucked, which is exactly where a soft ribbed collar starts to curl. At PILLAR, the Kevin Vest has a blade collar.
What fabric is best for a men's golf polo?
Polyester with spandex. Polyester moves moisture off the skin and dries fast, and 12 to 16 percent spandex gives the stretch and recovery a golf swing needs. Nylon blends read dressier and drape better but wick slightly less. Cotton pique is comfortable in cool weather and a poor choice for a hot round, because it holds water once it is wet.
What does four way stretch mean?
Fabric that stretches both along its length and across its width, so it moves in every direction the body does. Two way stretch moves in one direction only, which is what binds across the back in a golf swing or an overhead press.
What does UPF mean on clothing?
Ultraviolet Protection Factor, a rating of how much UV radiation a fabric blocks. UPF 30 blocks roughly 96.7 percent of UV and UPF 50 blocks roughly 98 percent. Unlike sunscreen it never needs reapplying, and unlike SPF it is measured on fabric rather than on skin. Tighter knits, synthetic fibers and darker colors all raise it.
What is the difference between athletic fit and slim fit?
Athletic fit tapers from a wider chest and shoulder to a narrower waist, so it fits a trained upper body without pulling. Slim fit is narrower throughout and allows less room for chest and shoulder development. Both describe the garment's shape, not the wearer's.
What is a curved hem?
A hem cut longer at the front and back than at the sides, following the body's line. It stays put when you reach or bend and looks deliberate worn untucked, where a straight hem pulls free. The PILLAR Nick Tee uses a curved hem; the Joey Tee uses a straight cut hem for tucking.
Keep Reading
Best Men's Polos
The fabric and collar decision, in full
Best Men's Black T-Shirts
How to tell a good one from a cheap one
The Right Polo Fit for Your Build
The three fit zones that actually matter
Now You Know What the Label Means
Polos and tees built to the specs above, in stock in Scottsdale.
Athletic Meets Aesthetic · pillarathletics.com
