Simple Rules Cowls

I knitted these two cowls on holiday. It's a very fun knit, ideal for using that one special skein of thick and thin yarn from your stash. The rule is very simple : knit when the yarn is thin, purl when it's thick! You can find the free pattern here on Ravelry.
The purple yarn is Verona Scheepjes, bought at Wolwollewool in Maastricht (the Netherlands). I have no idea of the blue yarn's name or specifications. It's probably a woolblend.
The purple cowl felt very prickly, so I lined it with some repurposed black fleece fabric, which makes it super warm.

The structure of the thick and thin yarns gets emphasized by the knitting pattern: