Applied Physics
Institutional graphics for impossible departments, field offices, and orbital operations.
For those who look closer.
Science, with
better typography.
Original mathematics, physics, and astronomy shirts for people who know the story behind the symbols.
The Proof & Particle standard
Smart enough that a physicist feels seen. Good-looking enough that nobody needs the explanation.
BeautyDiscoveryDepth
The collection system
Three ways into the idea.
Mathematical Lives
Human stories hidden inside theorems, proofs, and beautiful unfinished business.
Quiet Signals
Equations and insider jokes that reward a second look without demanding one.
The collection / 2026
22 shirts.
15 ideas.
Seven institutional designs are offered in both Original and Crew Editions. Each shirt works first as a graphic and then, for the right person, as recognition.
Crew EditionCrew neck
Crew EditionCrew neck
Crew EditionCrew neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neck
Crew EditionCrew neck + V-neck
Original EditionCrew neck + V-neckWhy Proof & Particle
The joke is never the whole design.
We start with the history, equation, or physical idea. Then we make something you would wear even if nobody at the coffee shop understands it. The recognition belongs to the people who do.
Read our story →Ordering
Ready when
you are.
Explore the collection here, then purchase securely through our Etsy shop.
Shop the collectionField notes
Good to know.
How do I order?
Choose a design here, then complete your purchase through the Proof & Particle Etsy shop. Etsy provides checkout, order confirmation, and delivery updates.
What are the two editions?
Original Editions place the established large graphic on the front. Crew Editions are built like issued workwear, with a small front-left-chest identifier and the full design on the back.
Can I choose the neckline?
Our original collection offers crew neck and V-neck options. Some newer designs are crew neck only; each product page shows its available necklines. “Crew Edition” describes artwork placement, not the collar.
Where can I find sizing and shipping details?
Each Etsy listing includes garment specifications, a size guide, current production estimates, and delivery information before checkout.
How heavy is the fabric?
Soft, lightweight cotton for comfortable everyday wear. Our current Black and Navy Bella + Canvas shirts are 100% combed and ring-spun cotton, approximately 4.2 oz/yd² (142 g/m²). These are lightweight shirts, not heavyweight tees.
How should I wash my shirt?
Turn inside out. Machine wash cold on a gentle cycle with similar colors and mild detergent. Avoid fabric softener and bleach. Do not dry-clean. Air-dry where practical, or tumble-dry on low. Use a cool iron inside out if needed; never iron directly on the printed design.
Pre-shrunk does not mean shrink-proof. Warm or hot washing and high-heat drying can cause further shrinkage and affect the print. Follow the care label supplied with your garment. Read the care guide →
Why is checkout on Etsy?
Etsy gives customers a familiar marketplace, secure checkout, and review system. Proofandparticle.com remains the permanent home of the brand.
Why explain the jokes?
Every listing includes a short “Behind the Design” note. Understanding should deepen the shirt, never be required to rescue it.
proofandparticle.com
Made for people who know the story.
Original designs · Mathematics, physics & astronomy