Stephen's work is digitally knitted on a Shima Seiki Japanese knitting machine.
With the machine, she programmes a knit structure into a computer that fits alongside the machine and the machine "digitally knits it".
Stephen said it was similar to how a 3D printer works especially when compared with some of her "whole garment programmed designs", which are knitted seamlessly from the hem up.
"So the hem will come out first and then it literally knits the garment, then the sleeves," she said.
"Knitting this way is interesting because you only use the yarn you need and this eliminates yarn waste because you're not cutting anything."
All of her designs are made with merino wool, which is used for the layer closest to the skin.
"I also use a yarn called pemotex which is a European yarn used mainly for industrial applications like for safety garments, so it's not usually used for fashion.
"What this material does is it shrinks and hardens so it distorts the wool in parts.
"It sounds kind of weird when I explain it out loud but when I was doing it, it all made perfect sense to me."
Stephen said she was "very excited" to exhibit her work in Germany thanks to Creative New Zealand funding, and is thankful for the opportunity for her textile design to become internationally recognised.