The vest is a present for my mother in law Tiiu. The yarn is lamb wool from the island of Hiiumaa (more here). No metrage is marked on the skeins but it looks very much like Aade Lõng 8/3 (100 g/270 m), only that this one is 2-ply.
Shawl collar bind off is done with larger needles. I-cord looks nice and solid, not too tight and not too loose.
On my blog.