J.Crew Merino Turtleneck Sweater - Dressing Up A Closet Basic

I've always liked the simple and polished ease of turtlenecks. I'm wearing last year's merino turtleneck sweater from J.Crew in the pretty plum color, a statement necklace from this summer, and wool pants. This turtleneck is available again in beautiful vivid colors like viridian green, dark grape and vibrant flame.

What's your favorite cold weather closet basic?