Sport-Tek Apparel

Wholesale Sport-Tek Apparel — Blank Performance Shirts, Polos, Fleece, and Jackets

Sport-Tek is one of the most widely carried performance apparel lines in the wholesale market — stocked by decorators, teams, and uniform programs across just about every category. At Bulkthreads.com, the full Sport-Tek catalog ships fast with automatic bulk discounts — no codes, no minimums.

PosiCharge Tees: The ST350 and Its Family

The ST350 PosiCharge Competitor Tee is one of the most decorated blank performance tees in the wholesale market. PosiCharge technology locks in color during printing and washing, which explains why so many screen printers and decorators reach for the ST350 for their athletic lines. It's available in basic, traditional, and extended colorways, plus a long-sleeve version (ST350LS) for year-round use. Women's and youth are covered too: the LST350 Ladies Competitor Tee and YST350 Youth Competitor Tee. For big and tall programs, the TST350 Tall Competitor Tee and TST350LS Tall Long Sleeve fill a gap many competitors leave open.

Performance Polos

The ST550 PosiCharge Competitor Polo covers the value end of Sport-Tek's polo range — moisture-wicking, color-locking, and available in the same broad color palette as the ST350. For clients who want a finer fabric hand, the ST650 Micropique Sport-Wick Polo offers a tighter knit with a more refined appearance — well suited for golf, hospitality, and corporate uniforming. The ST640 PosiCharge RacerMesh Polo is knit with an open-mesh construction for maximum breathability indoors and out. Women's versions are available for all three: LST550, LST650, and LST640. The TST650 Tall Micropique Polo rounds out the polo lineup for extended sizing programs.

UV Protection: The ST420 Posi-UV Pro Line

The ST420 Posi-UV Pro Tee is Sport-Tek's purpose-built sun-protection tee — UPF 50+ rated, moisture-wicking, and a strong option for outdoor programs, summer camps, and water-adjacent activities. It's available in short and long sleeve (ST420LS), with a youth version (YST420) and a ladies scoop neck (LST420). The ST520 Posi-UV Pro Polo brings UPF 50+ protection into a polo construction for golf and outdoor staff programs, with a women's version (LST520) available as well.

Tanks and Short-Sleeve Options

The ST356 PosiCharge Competitor Tank is the sleeveless counterpart to the ST350 — same PosiCharge fabric, same color-locking for decoration. The LST356 Ladies Racerback Tank and LST402 Tri-Blend Wicking Tank cover the women's segment. For programs that want a cotton-feel hand with performance properties, the ST450 Competitor Cotton Touch Tee bridges the gap — polyester construction that mimics the feel of a ring-spun cotton tee.

Fleece, Hoodies, and Quarter-Zips

Sport-Tek's fleece lineup spans from athletic to premium. The F281 Heavyweight Hoodie and F280 Heavyweight Crewneck are built for programs that need substantial weight and structure — heavier than standard blanks, with a surface that holds print particularly well. The F282 Heavyweight Full-Zip completes the set. The F244 Sport-Wick Fleece Hoodie is the performance alternative — moisture-wicking polyester fleece for athletic programs that want warmth without cotton. For stretch and versatility, the ST850 Sport-Wick Stretch 1/2-Zip is a versatile option — four-way stretch fabric that works for both athletic and smart-casual applications, with a women's version (LST850) and tall sizing (TST850) available.

Browse the complete Sport-Tek catalog at Bulkthreads, or shop by category: performance tees, polos, fleece and hoodies, and jackets.

Frequently Asked Questions

What is Sport-Tek PosiCharge technology?

PosiCharge is Sport-Tek's color-locking technology, built into fabrics like the ST350 and ST550. It works by using a positive electrical charge in the yarn to attract and hold dye during the dyeing and decoration process, which helps colors stay vibrant through repeated washing. It's one of the reasons Sport-Tek blanks are a common choice for screen printing and heat transfer decoration on athletic apparel.

What is the best Sport-Tek blank for screen printing?

The ST350 PosiCharge Competitor Tee is one of the most widely used Sport-Tek blanks for screen printing. Its PosiCharge construction helps ink adhere consistently, and its broad color range and available sizing — including youth, women's, and tall — make it a practical choice for full team or group decoration runs.

What is the difference between the Sport-Tek ST550, ST640, and ST650 polos?

The ST550 is the value-tier option — moisture-wicking and color-locking, suited for athletic and team programs. The ST640 RacerMesh uses an open-mesh knit for superior breathability, making it a good fit for high-activity outdoor use. The ST650 Micropique has a tighter, finer knit with a more refined appearance, which is why it tends to show up more in golf, hospitality, and corporate uniform programs. All three have women's counterparts available.

What Sport-Tek blank is best for outdoor and sun-protection programs?

The ST420 Posi-UV Pro Tee is Sport-Tek's purpose-built UPF 50+ option. It's available in short sleeve, long sleeve, youth, and a ladies scoop neck — making it a practical choice for summer camps, outdoor staff programs, and any application where sun protection is a stated requirement. The ST520 Posi-UV Pro Polo brings the same UPF 50+ rating into a polo construction for golf and outdoor corporate programs.

What is the difference between the Sport-Tek F281 and the F244?

The F281 is a super heavyweight cotton-blend hoodie built for weight, structure, and strong print surfaces — closer to a traditional fleece sweatshirt. The F244 Sport-Wick Fleece Hoodie is a polyester-based performance option with moisture-wicking properties, better suited for athletic programs where warmth and activity go together. If print quality and a substantial feel are the priority, the F281 is the more common choice; if the end use is athletic or active, the F244 is the better fit.

Does Sport-Tek make apparel in tall and extended sizing?

Yes. Several Sport-Tek styles are available in tall sizing, including the TST350 and TST350LS Tall Competitor Tees, the TST650 Tall Micropique Polo, and the TST850 Tall Sport-Wick Stretch 1/2-Zip. This makes Sport-Tek one of the more complete performance lines for programs that need to outfit a full range of body types from a single brand.

Do Sport-Tek blanks at Bulkthreads come with volume discounts?

Yes. Bulkthreads applies automatic volume discounts at checkout across the Sport-Tek catalog — no codes required. The per-unit cost decreases as order size increases, which makes it a practical source for team uniform runs, athletic programs, and large decoration orders.