50% off storewide closeout sale!

This is a going-out-of-business sale. This was started as a family business, and since my divorce several years ago, my heart hasn't been in it. So I'm moving on.

Everything is 50% off, while it lasts! The discount happens as soon as you put something in your cart.

Several designs are completely sold out and no longer available, and most shirts have sold out in one or more sizes.

Click here to see shirts listed by sizes that are still available.

Click here for for Women's shirts sorted by available sizes.

Click here for for Youth shirts sorted by available sizes.

Orders over $200 get a 15 percent discount and free USA shipping; orders over $400 get a 20 percent discount and free USA shipping.

Adult 4XL

Products

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Key Lime Pi T-shirt (4XL only)

Key Lime Pi T-shirt features a key, a chemical formula for lime, and the Pi symbol.
Black 4XL only.

Price: $20.

Apple Pi T-shirt (2XL, 4XL)

What do you get when you divide the circumference of an apple by twice its radius?
Apple Pi.

Price: $20.

Calculus Rules T-shirt (2XL, 4XL only)

Product Rule, Chain Rule, Quotient Rule . . . Calculus Rules!
Currently available only in 2XL, 4XL. Black or Ash Gray. $20.

Derivers Wanted Calculus T-shirt (Small, 2XL, 4XL)

Available in Black or Indigo Blue. Available in 2XL and 4XL, and in Long Sleeve Black Small. Also, one Blemished Medium.

Price: $20.

Eat Sleep Calculus Math Geek T-shirt
Sizes 2XL, 3XL, 4XL only.

Eat Sleep Calculus. What more need be said?

Pricing: $20.

Just du It Calculus T-shirt (Sm, Med, 4XL)
Adult Small, Medium, 4XL.

Just Integral du It -- for those who make integral calculus too complicated. T-shirt is Black. Pricing: $20.

Carbon Based T-shirt

Carbon Based and Proud of It! Show your pride at being a carbon-based life form.
Black or Indigo Blue.

Price: : $20.

GeNIUS Chemistry T-shirt (Large, 2XL, 3XL, 4XL only)
Sizes 2XL, 3XL, 4XL only, and a slightly blemished Large.

What do Germanium, Nitrogen, Iodine, Uranium, Sulfur spell to a chemistry geek?
GeNIUS.

Price: $20.
Blemish Sale item: One Large for $18.

Reality T-shirt

"Reality is for people who can't handle the square root of -1."
T-shirt is Black. Available in Women's Premium Hanes Nano Small, Medium, Large, and 2XL, and in Adult 3XL, 4XL, 5XL.

Pricing: $20.

Pi Symbol Glow T-shirt
Glows in the dark!
Comes in Men's, Women's, and Youth sizes, and in Men's Long Sleeve.

Price: $20.