Different languages, same idea.

def, fun, func, and function are the keywords used across many programming languages to define functions — the building blocks of software.

From Python to Kotlin, Go, JavaScript, and beyond, these words point to the same idea: logic that can be reused, organized, and executed when needed.

This design highlights something every engineer eventually learns: syntax changes, but the underlying ideas remain.

Different languages. Same foundation.

Because no matter the syntax, the goal is always the same: define the function.

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 and OCS. OEKO-TEX Standard 100 certified. 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 as soon as you place an order, 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