The Definitive Customizable Performance T-Shirt: Sport-Tek ST350 Competitor Tee
By: Diana Posted on: May 6, 2025Not every performance t-shirt can conquer marathons, shine in corporate events, outfit large teams, carry a team through physically demanding challenges, and still stay fresh.
The Sport-Tek ST350 can. So we are dedicating a blog to one of ShirtsBargain’s biggest bestsellers and one of the finest value offerings from Sport-Tek Wholesale.
Performance Meets Style…And Then Some
The Sport-Tek ST350 Competitor Tee is a performance masterpiece in almost every way. Made with a 100% polyester interlock of superb quality and enhanced by Sport-Tek’s PosiCharge fabric technology, the t-shirt is as durable as it comes, can lock in colors, wick moisture, and is made for customization.

Its utility and versatility make it a fine pick for outfitting teams or using as a promotional tool. The simple performance t-shirt's real-world use cases testify to the iconic style in the activewear market.
In this blog, we mean to look at all the different environments where the ST350 shines.
Charity & Non-Profit Organizations
When the goal is to use impactful promotional products and appealing merchandise to raise funds at the lowest possible investment, the ST350 is a wise choice. For fundraisers, the tee can outfit the organizing team and volunteers and keep them comfortable, cool, and dry for hours. It can also be a low-investment, high-impact merchandise item, owing to its customizability and color options. The t-shirt combines comfort with cause-driven marketing. Custom printed Sport-Tek t-shirts can tell stories or convey important messages related to the cause through the participants while generating funds.
Corporate Settings
The ST350 and many other Sport-Tek t-shirts work just as effectively in corporate events. The lightweight tee offers excellent breathability, so the team at the event can focus on their duties without discomfort for hours. Organizations use Sport-Tek apparel for:
- Team marathon events
- Corporate leisure challenges
- Outdoor team-building retreats
- Brand awareness campaigns
Fitness Industry
CrossFit boxes, boot camp programs, and fitness communities demand versatile and functional performance apparel that does not require big investments. The ST350 delivers there with its exceptional value, both from pricing and its features.

- It dries quickly
- It wicks moisture
- It keeps wearers cool and comfortable
- It generally fits true to size
- Minimal chafing
- No notable restrictions to mobility
Uniforms

Many Sport-Tek t-shirts make the perfect uniforms. The ST350, though lightweight, can be used as part of uniforms. They can function as a layering piece or as the main uniform piece, serving professionals including warehouse workers, fitness instructors, landscaping teams, restaurant staff, and more.
Customizing Sport-Tek ST350
The ST350 is built for customization and serves various purposes. The color options and customizability are key factors that make ST350 a clean investment for team uniforms.
It is great for:
- Screen printing
- Heat transfer vinyl
- Direct-to-garment printing
- Embroidery

Its smooth polyester surface delivers excellent results in screen printing and heat transfers. We’ve had customers successfully use the ST350 for creative DTG projects, too. It does reasonably well embroidering, provided professional embroiderers undertake the decoration. ShirtsBargain’s in-house embroidery team can have logos embroidered flawlessly on the ST350 and similar styles.
Maximizing the ST350’s Value
ST350, also known as “Sport-Tek Competitor Tee,” can be sourced from wholesale distributors like ShirtsBargain. We offer the tee at an unbeatable per-piece pricing of $5.19. But to minimize your investment and maximize the value of your purchase, you can take advantage of our bulk discounts, which cut the per-piece price of blank apparel even further depending on the order quantity. Along with this, if the order value goes above $129, you also get free shipping on blank apparel.
For ShirtsBargain's retail partners, this means:
- Better return on investment
- Premium feel at competitive prices
- Versatility across multiple markets
With the ST350, Sport-Tek clothing sells comfort and performance in one neat package. To suit any environment and almost any purpose - be it promotions or uniforms-—the ST350 comes in over 30 colors. It most certainly has been a game-changer for us and a long list of our customers.
The brand outdid itself with this style. Despite getting more advanced counterparts in various forms, the Sport-Tek ST350 remains the top dog, not just in ShirtsBargain but in the American activewear market itself.