• May include: A navy blue t-shirt with a graphic of a brown tabby cat playing with a ball of yarn. The text "String Theory Research" is printed on the shirt.
  • May include: A navy blue t-shirt with a cartoon cat holding a ball of yarn. The text "String Theory Research" is printed on the shirt.
  • May include: Sizing chart for a t-shirt with the text "Sir Meow" in white with a crown on top of the word "Sir". The chart shows the length and width measurements in inches for sizes S through 4XL.
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Espresso
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Moss
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee White
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Ivory
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Blossom
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Pepper
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Black
  • May include: A navy blue t-shirt with a graphic of a brown tabby cat playing with a ball of yarn. The text "String Theory Research" is printed on the shirt.
  • Product video
  • May include: A navy blue t-shirt with a cartoon cat holding a ball of yarn. The text "String Theory Research" is printed on the shirt.
  • May include: Sizing chart for a t-shirt with the text "Sir Meow" in white with a crown on top of the word "Sir". The chart shows the length and width measurements in inches for sizes S through 4XL.
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Espresso
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Moss
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee White
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Ivory
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Blossom
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Pepper
  • Comfort Colors String Theory Cat Shirt: Funny Physics Tee Black
Report this item to Etsy

Comfort Colors String Theory Cat Shirt: Funny Physics Tee

Item highlights

  • Materials: 100 percent US cotton
  • Made to order
View more

Shop review

Why this review appears

All reviews are from verified buyers. This review is shown automatically based on factors like recency, whether it includes comments, your chosen language, and whether the rating reflects the typical experience with the shop.

“Such a fun shirt for my nerdy kid (complimentary!).”

Marla

5 days ago

View all

Price:$34.01+

Please select an option

Please select an option

You can only make an offer when buying a single item

Shipping & return policies
  • Get it by
    Oct 28-Nov 2
  • Cost to ship
    $5.57 to United States, 43215.

    Enjoy free shipping to the US when you spend $35+ at this shop.

Seller's description

Specifications

May include: A navy blue t-shirt with a graphic of a brown tabby cat playing with a ball of yarn. The text "String Theory Research" is printed on the shirt.

🧶 Forget quantum mechanics — this is String Theory, kitten edition. Featuring a curious little researcher tangled in yarn, this tee is perfect for physicists, cat lovers, or anyone who enjoys a side of chaos with their science.

Whether you’re hitting the lab or lounging at home, this design is a purrfect blend of nerdy humor and adorable cat antics.

😸 Ideal for:
• Science nerds with cats
• Yarn hoarders who claim it’s for “research”
• Students who actually understand string theory (or at least pretend to)

🧵 Features:
• Printed on Comfort Colors 1717 tee (soft, vintage washed feel)
• Unisex fit — comfy and flattering for all shapes of genius
• High-quality DTG print that’ll hold up through many experiments (and naps)

Product features
- Durable double-needle stitching for lasting quality.
- Garment-dyed for a soft texture and unique color.
- Pre-shrunk 100% US cotton ensures comfort and size retention.
- Ethically made with sustainable practices in Honduras.

Care instructions
- Machine wash: cold (max 30C or 90F)
- Do not bleach
- Tumble dry: low heat
- Iron, steam or dry: low heat
- Do not dryclean


EU representative: HONSON VENTURES LIMITED, gpsr [!at] honsonventures.com, 3, Gnaftis House flat 102, Limassol, Mesa Geitonia, 4003, CY
Product information: Comfort Colors® 1717, 2 year warranty in EU and Northern Ireland as per Directive 1999/44/EC
Warnings, Hazard: For adults, Made in Honduras
Care instructions: Machine wash: cold (max 30C or 90F), Do not bleach, Tumble dry: low heat, Iron, steam or dry: low heat, Do not dryclean

SirMeowMeow made this item with help from
Printify, Wilmington, DE

Delivery details and policies

  • Get it by
    Oct 28-Nov 2
  • Returns and exchanges
    Not accepted.
  • Ships from
    Hialeah, FL
  • Cost to ship
    $5.57 to United States, 43215

    Enjoy free shipping to the US when you spend $35+ at this shop.

    There was a problem calculating your shipping. Please try again.

Shop with confidence
Etsy Purchase Protection

If something goes wrong with an order, we've got your back on all eligible purchases. View program terms

Climate investments

Etsy supports climate solutions, from electric delivery trucks to carbon offsets for every delivery. View how

Meet your seller

SirMeowMeow
May
SirMeowMeow ·

Wilmington, Delaware

We calculate this number using a recency-weighted average of all ratings, with a rating's value decreasing by half each year to best reflect the current experience. 4.9
·
876 sales
·
2.5 years on Etsy

Usually responds in a few hours

Smooth shipping Has a history of shipping on time with tracking.

Speedy replies Has a history of replying to messages quickly.

You may also like

Shoppers with similar taste loved these

Show more
Show more

Explore related searches

What Cats Really Think

What Cats Really Think T-shirt

Shrodingers Cat

What Cats Really Think Shirt

Physics Science Shirt

Cat Physics Shirt

Cat Geometry Shirt

Physics Tshirts

Tell Schrodinger I Survived

Listed on Sep 10, 2026
One favorite
Homepage Clothing

Looking for more? Find it on Etsy