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Trapdoor

€22.77 (plus tax)

A trapdoor function is easy to compute and hard to invert, unless you hold the secret that makes inversion easy. The asymmetry is the point. Everyone can go one way. Only the holder comes back.

Select size

More details

  • 100% organic ring-spun cotton
  • Midweight fabric (5.3 oz)
  • Regular fit
  • Unisex sizing

Quality Guarantee & Returns

  • Quality is guaranteed. If there is a print error or visible quality issue, we'll replace or refund it.
  • Because the products are made to order, we do not accept general returns or sizing-related returns.

Trapdoor Size Guide

Size guide preview
Size label Length Width Sleeve length
S
27.17
19.49
8.86
M
28.74
216
9.45
L
29.53
22.24
9.65
XL
30.31
23.43
9.84
2XL
31.1
25
104
3XL
31.89
26.57
10.24
4XL
32.68
28.54
10.24
5XL
337
30.51
10.24

Our suppliers provide these measurements. Note that product dimensions may differ by up to 2 inches (5 cm).

Customers in the US should consider selecting one size larger as the EU sizes from this supplier tend to be smaller compared to US sizing.

A useful tip! Compare the measurements of one of your own items at home with those listed in this guide to ensure the best fit.

A Length

Start the tape at the top of the tee right next to the collar (Highest Point Shoulder) and extend it to the bottom edge of the shirt.

B Width

Begin measuring from the seam right under one sleeve and extend the tape across to the seam under the opposite sleeve.

C Sleeve length

Start the tape at the top of the set-in sleeve and measure down to the sleeve's hem.

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