Some bugs don’t break the system — they break expectations.

NaN != NaN

It looks wrong.
But it’s not.

In IEEE floating-point systems, NaN (Not a Number) represents undefined or invalid results — and by definition, it is not equal to anything, including itself.

No equality.
No symmetry.
No assumptions.

For developers, encountering NaN is part of real-world debugging — a signal that something went off track in the data or computation.

This isn’t a bug in the language.
It’s a rule of the system.

Counterintuitive. Precise. Unforgiving.

Because sometimes the answer isn’t wrong — it’s not a number.

NaN != NaN

Product details

100% organic ring-spun cotton
5.3 oz./yd² (180 g/m²)
Single jersey construction
Medium fit
Set-in sleeves
1 × 1 ribbed collar
Double-needle stitching (sleeves & hem)
Self-fabric neck tape

Certified under GOTS, OCS, OEKO-TEX Standard 100, and PETA-Approved Vegan.

Blank product sourced from Bangladesh.

Note: Sizes correspond to a smaller fit in the US market. US customers may prefer ordering one size up.

Made on demand

This product is made especially for you after purchase, helping reduce overproduction.

Compliance

• Traceability:
- Weaving—Bangladesh
- Dyeing—Bangladesh
- Manufacturing—Bangladesh
• Contains 0% recycled polyester
• Contains 0% dangerous substances

Age restrictions: For adults
EU Warranty: 2 years
Meets EU REACH requirements

In compliance with the General Product Safety Regulation (GPSR), Developers Threads and SINDEN VENTURES LIMITED ensure product safety and EU standards.
Contact: gpsr@sindenventures.com
Address: Markou Evgenikou 11, Limassol, Cyprus

Size guide