Those 'thick cable-knit Arran sweaters' are actually Aran sweaters - one 'r' only - and are nothing whatsoever to do with the Western Isles, they originate from the Irish island of Aran, not the Scottish island of Arran. That's what I've read but I expect that, as usual, some smart-arse will tell me I'm wrong! LOL!
S:0)