Pattern adapted from manuscript for needle work patterns dating back to the 1800 to a priest´s wife on the farm HRUNI, South of Iceland.
See my project on Craftsy here.
The un-spun lopi wool is very lightweight and you knit it with little tension on a fairly big needle ( US10/ 6mm), in case you substitute, have this in mind. The un-spun lopi with its loose fibers makes a uniquely lightweight but warm sweater.
Find unspun lopi / plötulopi: www.thingborg.net; www.istex.is, http://knittingiceland.is