The only word I have for Plotulopi is "ethereal." It is like knitting with air it is so weightless. I am using it double, so it knits up to aran gauge, but without any of the weight of usual aran yarns. The warmth comes from the air trapped inside the fibers (much like the way down provides warmth in a puffer jacket). It is so soft, it feels wonderful in my hands. I am making the Diamond Twill vest from "52 Weeks of Easy Knits" and looking forward to more projects with this wonderful yarn.