The Icebreaker Sonebula Long Sleeve is a mid-weight functional base layer with raglan sleeves and side stripes. The 200g/m² thick long-sleeved shirt, made from 100% merino wool, is both temperature-regulating and odor-resistant. The ergonomic sleeve construction ensures unrestricted freedom of movement in the shoulder area, and flat seams prevent pressure points. Due to its medium fabric weight, the Merino long sleeve is a versatile all-rounder for skiing, ski touring, or snowshoeing.
This Icebreaker base layer is certified mulesing-free and particularly environmentally friendly, as merino wool requires less washing due to its natural odor resistance and does not pollute wastewater with microplastics . Learn more about the advantages of merino base layers in a detailed comparison of merino vs. synthetic fibers.
Material: 100% Wool (Merino Wool)
Material thickness: 200g/m²
Fit: Bodyfit (form-fitting)





