Question 1

Does the ST640 Polo have UV protection?

Accepted Answer

No. The Sport-Tek ST640 is designed for superior breathability that delivers excellent cooling. Being a performance t-shirt meant for the outdoors, it does offer basic UV protection but is not UPF-rated.

Question 2

Is the Sport-Tek ST640 Polo suitable for outdoor activities?

Accepted Answer

It is. The ST640 is a performance polo shirt. So it comes with moisture-management and durability traits to aid physical activities. Though it does not have UPF-rated UV protection, its exceptional breathability can give a cooling effect outdoors.

Question 3

Can the ST640 Polo be used for work uniforms?

Accepted Answer

Absolutely. Some of our buyers buy the ST640 for team uniforming as the t-shirt comes in over 20 colors, lasts really long, does not shrink, and offers great moisture-management at a very attractive price point. In ShirtsBargain, the value goes up further with our volume discounts when bulk ordering uniform polo shirts like the ST640.

Question 4

What sizes are available for the Sport-Tek ST640 Polo?

Accepted Answer

The ST640 RacerMesh polo from Sport-Tek is available in XS to 4XL sizes. It also comes in youth size with the style code YST640.

Question 5

Is the ST640 performance polo from Sport-Tek unisex?

Accepted Answer

No. The ST640 performance polo shirt is primarily meant for men. But the t-shirt does come in a women-specific style. Try searching for the style code LST640. The LST640 polo shirt for women features an open placket unlike the ST640. But for women who prefer buttons on their polo, the ST640 is still a good choice.

Question 6

Is there a price advantage for ordering ST640 in bulk compared to ST650?

Accepted Answer

There is always a price advantage when ordering apparel in bulk from ShirtsBargain. This applies to ST640 too. The ST650 is an improvement over the ST640 - an upgraded version of the style, with double-needle stitching throughout, armhole accent, side vents, and considerable snag resistance. It’s also made of 100% polyester tricot, while the ST640 is 100% polyester flat back mesh. ST640 features PosiCharge while the ST650 doesn’t. Due to these factors, the ST650 has a slightly higher price point that also comes down as the order volume for the style goes up.

Question 7

Is the ST640 Polo fade-resistant?

Accepted Answer

Yes, the ST640 is a PosiCharge polo shirt that locks in colors - both the garment’s and the designs that go on it. Because it’s 100% polyester and thanks to PosiCharge, the ST640 is very resistant to color fading even after a lot of washes. The designs on it also don’t fade compared to regular polyester shirts in the same price point.

Question 8

Which polo is more breathable and comfortable in hot climates — ST640 or ST550?

Accepted Answer

The ST640 is designed for superior breathability, so much that it offers an excellent cooling effect outdoors. The ST550 is more budget-friendly and offers considerable breathability and moisture-wicking but not as much as the ST640. The ST640 is slightly better and comfortable in hot climates.

Question 9

Is the ST640 Polo eco-friendly?

Accepted Answer

No. The ST640 is made of polyester. Though the manufacturing brand Sport-Tek does have eco-friendly policies, the ST640 t-shirt itself cannot be classified as eco-friendly.

Question 10

What are the benefits of a polyester mesh fabric in the ST640 Polo?

Accepted Answer

The polyester flat back mesh of the ST640 performance polo shirt makes it incredibly breathable, with a notable cooling effect. The fabric also adds a lot of durability and enhances shape retention of the shirt. The construction is done in a way that the polo gets a silky texture and a soft hand feel.

Question 11

What is the fabric and weight of the Sport‑Tek ST640 PosiCharge RacerMesh Polo?

Accepted Answer

It’s made from 3.8‑ounce, 100% polyester flat back mesh featuring PosiCharge technology.

Question 12

How does the RacerMesh fabric perform for breathability and cooling?

Accepted Answer

The ultra‑fine flat back RacerMesh provides unparalleled breathability for superior cooling, and the fabric is moisture‑wicking to help keep you dry.

Question 13

What is PosiCharge technology and why is it useful?

Accepted Answer

PosiCharge technology locks in color to help resist fading and keeps logos crisp and clear over time.

Question 14

What are the collar and placket details on this polo?

Accepted Answer

It has a flat knit collar with a 3‑button placket and dyed‑to‑match buttons.

Question 15

Does the ST640 have a tag‑free label and a taped neck?

Accepted Answer

Yes. It features a tag‑free label for comfort and a taped neck for added durability and a clean finish.

Question 16

What type of sleeves does this polo have?

Accepted Answer

It has set‑in, open hem sleeves for a clean, comfortable look.

Question 17

What sizes are available for the ST640?

Accepted Answer

Sizes range from XS to 4XL.

Question 18

Which customization methods work best on this 100% polyester polo?

Accepted Answer

It’s ideal for Sublimation and DTF transfers. We currently offer DTG only on 100% cotton t‑shirts, so choose Sublimation or DTF for this style.

Question 19

Is this polo a good choice for uniforms or repeated orders?

Accepted Answer

Yes. Its lightweight, moisture‑wicking fabric with PosiCharge color‑locking, along with its comfortable feel and durable quality, makes it a reliable pick for teams and businesses.

Question 20

How does the ST640 compare to the ladies LST640?

Accepted Answer

Both share the same 3.8‑oz, 100% polyester RacerMesh with PosiCharge and tag‑free comfort. The ST640 has a flat knit collar and 3‑button placket, while the LST640 has a self‑fabric collar with an open placket.

Name	Sport-Tek ST640 Performance Polo
Brand	Sport-Tek
Style Number	ST640
Fabric	Polyester
Gender	Mens
Sizes	XS, S, M, L, XL, 2XL, 3XL, 4XL
Category	Polos
Sub-Category	Performance Polo

Style ST640

Sport-Tek® Polo - Men's PosiCharge® RacerMesh® Polo ST640

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Customer Q & A

Does the ST640 Polo have UV protection?

Is the Sport-Tek ST640 Polo suitable for outdoor activities?

Can the ST640 Polo be used for work uniforms?

What sizes are available for the Sport-Tek ST640 Polo?

Is the ST640 performance polo from Sport-Tek unisex?

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