There is an easy recipe for pure decadence - add lots of cashmere. For our most luxurious socks of FW16 we used a subtly flecked cashmere yarn with a sophisticated flair that isn't over the top. They are knit in PA from imported cashmere yarn.
If you want to go big into cashmere, then grab the 4 pack at 25% off.
Knit in Pennsylvania at a family owned mill using imported cashmere yarn. In addition to being super soft and quite warm, the yarn has a beautiful "donegal" effect reminiscent of flecking in tweed cloth