Sling on the Dexters Laboratory T-Shirt: Boy Genius in charcoal grey soft-style cotton — officially licensed Dexters Laboratory merchandise leaning on the show's self-styled tagline.

"Boy Genius" is the framing the title character applies to himself throughout the series, the in-show punchline that the design lifts onto the chest. The print sits as a wordmark-led graphic rather than a character portrait.

Available in a charcoal grey colourway, soft-style cotton body cut for everyday wear, short sleeves, regular unisex fit through Small to XX-Large. Pairs with denim or works under a hoodie.

• Rockoff officially licensed product
• Style: Unisex Short-Sleeve T-Shirt
• Design: Boy Genius
• Colour: Charcoal Grey
• Material: Soft-Style Cotton
• Sleeve or Collar Styling: Short Sleeves
• Great for: cartoon-merch collectors, retro-animation fans, type-led print rotation

Yes, all of our products are 100% genuine and officially licensed

Please refer to our size chart located above the buy button. It can also be found on the left-hand side of the screen on some devices. We recommend measuring an item you love and then comparing the measurements to the size chart.

Items in stock at our UK shop are dispatched in 1–2 working days. You'll see this under the Add to Bag button when you pick your size.

All other items come from our licensed partner's warehouse and are dispatched in about 5 working days (up to 10 at busy times).

UK delivery is Royal Mail Tracked, usually 2–4 working days after dispatch, and free on UK orders over £40. Delivery costs are shown at checkout.

All items are dispatched from the UK.