Sometimes the result isn’t a number.

NaN

Not a value.
Not zero.
Not valid.

NaN — Not a Number — appears when a system cannot represent the result of a computation.

Unexpected inputs.
Broken assumptions.
Calculations that don’t resolve.

Developers encounter it everywhere — consoles, data pipelines, numerical operations, debugging sessions.

A small output with a clear message:
something didn’t add up.

It doesn’t crash the system.
It exposes the flaw.

Undefined. Subtle. Real.

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

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