These sweaters are my favourites. They are twins (Kaksikud in Estonian), albeit not identical. I used the same yarns for both (Angora 2 and Haapsalu). The grey one is slightly shorter (750 m of both yarns held together). A very simple straightforward construction, seamless, of course. Need I say more! Modelled pictures by Kristiina.
You can read more on my blog about this construction.