- The Kari Traa Smekker Long Sleeve is a lightweight, 100% Merino wool women’s baselayer top with a round neck and a great look. Naturally breathable and odor-resistant, wool keeps you warm whether it’s wet or dry and feels great against your skin. Flatlock seams turn up the comfort level when you turn up the heat. Panels of Jacquard-knit patterns in different intensities create flattering lines.