This yarn is a soft, single ply lace weight one. 100g/800m. 65% superwash extra fine merino, 20% mulberry silk, 15% natural grey yak. This is why it's gray undyed. We do recommend gentle, cold handwash to prolong the life of yarn and your knits. Recommended needle size: 3-4 mm. And it's nice for hand weaving too!