DON'T BE STUPID! Muscle Shirt

In a world overflowing with bad decisions and questionable choices, you can be the voice of reason—without saying a word. The "DON’T BE STUPID!" design isn’t just bold—it’s a statement, a public service announcement, and a conversation starter all in one. With its vintage marquee sign style and glowing lightbulb effect, it radiates rock-and-roll energy, sharp humor, and a no-nonsense attitude. Wearing this design on our apparel makes you stand out, turning heads while delivering a message with confidence and style. Own the look, own the attitude—grab yours today and show the world you’ve got the mindset, the message, and the style to match.

This soft, sleeveless tank is so comfy you're going to want to wear it everywhere, be it on your couch, out on a walk, or during a yoga class. The relaxed fit and low-cut armholes gives it a casual, urban look.

• 100% airlume combed ring-spun cotton
• Fabric weight: 4.2 oz/y² (142 g/m²)
• 32 singles
• Relaxed fit
• Side-seamed construction
• Wide, low-cut armholes
• Blank product sourced from Nicaragua, Honduras, or the US

This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!

Age restrictions: For adults
EU Warranty: 2 years
Other compliance information: Meets the flammability level requirements.

In compliance with the General Product Safety Regulation (GPSR), Rocka Rolla Gear and SINDEN VENTURES LIMITED ensure that all consumer products offered are safe and meet EU standards. For any product safety related inquiries or concerns, please contact our EU representative at gpsr@sindenventures.com. You can also write to us at 266 West 22nd Street
Holland, Michigan 49423 or Markou Evgenikou 11, Mesa Geitonia, 4002, Limassol, Cyprus.

Size guide