From the Knit Rowan website:
Knit this ladies v neck vest top from Winter Selects. Designed by Martin Storey using the premium hand painted yarn Fine Art Aran (merino wool, kid mohair and silk), this slipover has a deep rib welt.

Yarn information:
Photographed in Congo 545
3, 4, 4, 5 skeins
558, 744, 744, 930 yards