Sport-Tek ST350 PosiCharge Competitor performance t-shirt

Shown: True Red — tap any color below to see it here

Sport-Tek · Style ST350 · PosiCharge® Competitor™ Tee

Sport-Tek ST350 Custom Performance Shirts

The moisture-wicking tee most customers just call a dri-fit. Light, breathable, and built for teams, leagues, camps and crews that sweat - which in South Florida is everyone.

  • 3.8 oz, 100% polyester interlock knit
  • PosiCharge® technology locks in color wash after wash
  • 34 colors · light, roomy, breathable
  • 24-piece minimum · no setup fees · mix colors and sizes
7,000+ST350-series pieces printed last year
3ROQ automatic presses
7–10 daystypical turnaround
Get Same-Day Pricing

Real numbers back the same business day — not a range.

Pick your colors

Tap a color to see the actual blank up top — your picks ride along invisibly when you send the quote form.

Colors (34) No colors picked yet

Garment photos are supplier stock images of the actual blank. Long-sleeve (ST350L), women's (LST350) and youth versions run in the same colors - ask and we will quote the mix together.

Get pricing on your ST350 order

Tell us what you are printing and roughly how many. We come back the same business day with real numbers, not a range.

Sport-Tek ST350 specs

Style numberSport-Tek ST350 (SanMar)
Fabric100% polyester interlock with PosiCharge® technology
Weight3.8 oz/yd² - the lightest blank we run
KnitInterlock: denser and smoother than jersey, so prints hold detail
FamilyAlso available long-sleeve (ST350L), women's (LST350) and youth
Colors34
SizesFull adult size run; extended sizes available

Tell us your color and size run and we will confirm live stock the same day. Need a fit sample before outfitting the whole team? Ask and we will send one.

How the ST350 behaves under ink

This is the part most printers will not tell you before they take your money.

Highest dye-migration risk we print

100% polyester dye turns to gas at curing temperature and can ghost into the print days later – worst on reds, royals and maroons. We run a low-bleed poly underbase and cure as cool as the ink allows, on every single ST350 job. Ask any other shop whether they do.

PosiCharge is not a print shield

PosiCharge locks the garment color against fading in the wash – it does nothing to stop dye migration into ink. A shop that treats it as protection will hand you shirts that discolor in two weeks. We treat every ST350 as the high-risk substrate it is.

Interlock knit holds detail

The interlock face is denser and smoother than a standard jersey, so logos, numbers and fine text print cleaner than you would expect from a shirt this light.

Deciding between this and another blank? Our guide to the best shirts for screen printing ranks the top ten by what we actually print. Want cotton instead? See the Next Level 6210 or the Comfort Colors 1717.

Sport-Tek ST350 questions, answered

What is the minimum order on ST350 shirts?

24 pieces, with no setup fees. You can mix colors and sizes inside that 24 as long as the printed design is the same.

Is this the same as a Nike Dri-FIT?

Dri-FIT is Nike's brand name - the ST350 is Sport-Tek's equivalent moisture-wicking performance tee, at a fraction of the price and made for printing. It is what most of our team and league customers mean when they ask for dri-fits.

Can you screen print on 100% polyester without the colors bleeding?

Yes - if it is done right. Polyester dye migrates into ink at curing temperature, so we run a low-bleed underbase and a controlled cure on every ST350 job. That is the difference between a print that stays bright and one that turns pink on a red shirt two weeks after delivery.

Do you print team numbers and names?

Tell us what the roster needs in the form and we will quote it - individual names and numbers are priced per piece on top of the base print.

Is there a long-sleeve or women's version?

Yes. The ST350L long sleeve runs in the same colors - we printed over 4,000 of them last year - and there is a women's cut (LST350) and youth sizes. We can mix them in one order under one print setup.

Will the color fade in the wash?

That is what PosiCharge is for - it locks the garment dye so team colors stay bright wash after wash. Wash cold, skip the fabric softener, tumble dry low.

Do you ship, or is this local pickup only?

Both. We are in Deerfield Beach and plenty of customers pick up, but we ship orders anywhere in the US.

Ready to price your order?

24-piece minimum. No setup fees. Same-day pricing from a shop that runs this blank every week.

Need cotton instead? See the Next Level 6210 or Comfort Colors 1717, or contact us.