
Delta Xi / Mathematics-inspired apparel
Knowledge
attracts.
Subtle, mathematics-inspired apparel designed to be recognised.
Made to order. Free standard shipping to supported destinations.
Ideas made to wear
Find your field.
Browse equations, physical laws and the logic behind the things we build. Choose your design, then find your colour and fit.
Affiliate programme
Share the ideas.
Earn 5% commission.
- Earn 5% commission on purchases made by your referrals.
- Your referrals get 10% off their first purchase.
- Receive 5% cashback on your own eligible purchases.
- Request a PayPal payout once your balance reaches $10.
Affiliate summary
Your link, referrals and earnings
Commissions · USD
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Referrals
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Greenspark partnership
Your order helps plant a tree.
Every completed order includes a tree contribution through Greenspark.
1
Tree contribution per order
Greenspark
Reforestation partner
Included with your order
No extra step at checkout. We arrange the tree contribution through Greenspark.
Support reforestation
Greenspark connects businesses with reforestation projects. Read about the projects and how they work.
Made when you choose it
Your clothing is made to order. The tree contribution comes alongside your purchase.
The ideas behind the ink
Stay for the explanation.
Curious about the maths? Browse concepts, work through an example and explore the equations behind the designs. You don't have to buy anything.
Explore LearnMade after you order
Each piece is printed or embroidered after you order, then shipped to you. Allow time for both production and delivery.
Check the fit first
Product pages include a size guide. Compare it with a shirt you already like wearing.
A real person can help
Questions about an order, a design or a return? Write to [email protected].



