Spinni

Spinni is one of Isager's original foundation yarns, and it's earned legendary status for a reason. Single-ply, lace weight, 100% wool, spun and dyed at Skive Garn in Denmark, with a rustic, twined character and a distinctive luster — the "Isager glow" — that plied yarns just don't have. Old-school Icelandic lace was hand-spun this fine so a finished shawl could pull through a ring; Spinni carries that same heritage into a genuinely versatile modern yarn. Crisp enough that yarnovers and decreases stay sharp and open in lace, but hold up in stranded colorwork and texture too.
Hold it alone for something light and airy, hold it double for real substance, or pair it with a silk mohair for extra softness and warmth — it's famously flexible that way.