Sport-Tek ST356 PosiCharge Competitor Tank.

Features

3.8-ounce 100% polyester interlock that is light and breathable for active wear

PosiCharge technology that locks in color so the tank resists fading wash after wash

Binding at the neck and armholes for a tidy finish that holds its shape

Open armholes that keep you cool and free to move during activity

Removable tag for comfort and for relabeling with your own brand

Smooth interlock surface that holds crisp, clean decoration

Machine washable for simple, everyday care

Screen prints and heat transfers well for team, gym, and running programs

Sizes	24-47	48-71	72-143	144-239	240-359	360+	Quantity
XS C	$7.30	$6.48	$6.19	$5.90	$5.73	$5.45	- +
S C	$7.30	$6.48	$6.19	$5.90	$5.73	$5.45	- +
M	$7.30	$6.48	$6.19	$5.90	$5.73	$5.45	SOLD Get restock alert
L C	$7.30	$6.48	$6.19	$5.90	$5.73	$5.45	- +
XL C	$7.30	$6.48	$6.19	$5.90	$5.73	$5.45	- +
2XL C	$8.38	$7.55	$7.24	$6.94	$6.76	$6.45	- +
3XL C	$10.54	$9.68	$9.35	$9.02	$8.81	$8.45	- +
4XL C	$11.62	$10.75	$10.40	$10.06	$9.83	$9.45	- +

Description

The Sport-Tek ST356 PosiCharge Competitor Tank is a lightweight, performance tank built for active wear and clean, professional branding. It is made from a 3.8-ounce 100% polyester interlock with PosiCharge technology, which locks in color so the tank keeps its look wash after wash and resists the fading that can dull team colors over a season. The light, breathable interlock knit makes the ST356 a strong choice for teams, gyms, running programs, and everyday active wear.

The construction is built for comfort, movement, and quality decoration. Binding at the neck and armholes gives the edges a tidy, finished feel that holds its shape through repeated wear, and the open armholes keep you cool and free to move during activity. A removable tag lets you relabel the tank for your own brand while keeping the interior comfortable, and the smooth interlock surface takes screen printing and heat transfer cleanly, ready for your logo.

Care Instructions

Machine wash cold on a gentle cycle with like colors.
Do not bleach or use fabric softener, since this protects the fabric and the PosiCharge finish.
Tumble dry low.
Do not iron directly over any decoration.
Store folded in a cool, dry place.

Available Colors

Royal, True Navy, Iron Grey, Black, True Royal, White, True Red

Available Sizes

XS, S, M, L, XL, 2XL, 3XL, 4XL

Customization Options

Embroidery
Screen Printing
Direct-to-film

Size Chart

	XS	S	M	L	XL	2XL	3XL	4XL
Chest	32-34	35-37	38-40	41-43	44-46	47-49	50-53	54-57

Brand Intro

Known for its athletic polos, moisture-wicking tees, hoodies, and lightweight jackets, the brand focuses on functional fabrics that stay comfortable under pressure. It’s widely trusted by teams, schools, and businesses that need consistent quality for uniforms and branded apparel. In the wholesale space, Sport-Tek has become a benchmark for dependable, performance-driven activewear that works in both sport and everyday use.

To learn more, visit our Sport-tek brand page

Shipping and Return

Free shipping on orders over $250 anywhere in the US. A $10 flat fee applies on orders under $250.
Orders placed before 3 p.m. CST are processed and shipped the same day. Delays may occur during sales or peak shopping periods.
Shipping options include Ground, Express, and ASAP depending on how fast you need delivery.
Delivery times range from 2–5 business days for Ground, 2–3 days for Express, and next business day for ASAP (based on cut-off times).
Returns are accepted within 30 days with approved RA. Items must be unused and in original condition. Restocking fees may apply in some cases.