It maybe actual layering or just a trick of an eye. Like in this design below - Duplicity pullover. It only looks that it has 2 shirts worn over each other, but it is actually some clever trimming incorporated and thanks to its texture difference and contrast it makes the sweater pop. Fibers that have been used in it are Tsumugi silk and Wool wrapped stainless Steel. Both from Habu textiles and of course it just can't get any better with those yarns!
Duplicity on Ravelry
Puzzle Vest in its turn represents a garment you that is also made with Tsumugi silk, but created texture and combination of complimenting colors make it fun when worn on its own and when layered.
Puzzle Vest on Ravelry
Arcus means "rolling cloud" and it is exactly what this pullover looks and does even more. Knit in silk mohair and is versatile as it offers wearer many options. Incorporated drawstring casings are knit into the body of the sweater, so there is not much of fiddly finishing there. By pulling them up along the shoulders, they create these rolling folds around the entire yoke, you can let them out and have an oversized cowl around your neckline or even pull it over your head for a snood. The cocoon feel of this amazing fiber certainly feels as luxury!
Arcus Pullover on Ravelry
Which one will you knit now?