I just picked up the new Kelvin Lite Hoody and think its a thousand times better than the previous versions. The outer fabric seems much quieter, the Primaloft Hi-Loft insulation is a lot warmer than the previous version, and the interior lining of the jacket is no longer the loud nylon fabric. The side panels are also improved with the Primaloft Alpha.
It reminds me of a warmer, slightly less breathable but more wind/water resistant version of the Patagonia Nano Air. I think it would work well for long glassing sessions or cold still hunting.