“The great thing about it is that you start from a fret, and you end up making a whole material, and the same yarn can produce something heavy or light,” he continues. “This sweater is the same yarn but a different stitch, and here I put five yarns together. And then you can cook it in the washing machine and change the texture. So with the same yarn you can create so many effects — the possibilities are endless. I have boxes full of these experiments.”