"Lagenlook" or layered look, as it originated in Europe, combines color, texture and shape in ways that will keep you warm but are different from the old ways we had of dressing in layers. The style combines mostly solid color pieces, made of natural fibers such as cotton, linen, and wool that have different proportions than those we grew up with. Think long over short, short over long, full with skinny, and skinny with full.
You can find these clothes on etsy or ebay or amazon, just enter lagenlook as a search term and your size and fabric preference (cotton, linen, or wool.) You can also find wonderful pieces at thrift stores and your own closet - just mix them up in ways you never did before.