Sorry, you are using an unsupported browser.

Windows (desktop)

Internet Explorer - We support version 10 or above.
Edge - We support EdgeHTML 13 or above.
Firefox - We support version 29 or above.
Chrome - We support version 23 or above.
Opera - We support version 30 or above.


Mac (desktop)

Safari - We support version 5 or above.
Chrome - We support version 16 or above.
Firefox - We support version 29 or above.
Opera - We support version 17 or above.

iOS (iPhone/iPod)

Make sure you are running iOS 6 or above.

Crown
10% off
20% off
free

Buy More, Save More.

We don't believe in sales; we believe in rewards. Every additional item in your cart means you're getting a better deal. Consider it our way of saying “thanks."

18-Hour Jersey   -   Crew Neck Undershirt   -   $ 32
Uploads 2f40f227c4 37ca 499b bd8b 40b1c0612695 2fundershirt crew greyheather front min

Size & Fit

Use your chest measurement to match our suggested size.

Undershirts

True-to-size and strategically extra slim to ensure a bulk-free and streamlined fit.

Size

S M L XL XXL

Chest

36-38" 38-40" 40-42" 42-45" 45-47"

FEEL IT TO BELIEVE IT

Try it on. If you don't love it, let us know. We'll help you find the right fit. Free shipping and returns.

GUYS LOVE THIS STUFF

"I REALLY like the undershirts I ordered from you. I will remember your brand and website VERY favorably. Your design and quality of this particular item are five-star!"

-Darren, TX

"Your undershirts are extremely comfortable and are now my favorite. In a nutshell, there is a clear difference in quality and level of thought put into design when it comes to your products. I am going to be recommending Mack Weldon to everyone I know.”

-Syed, IL