A base layer composed of our ultra-polyvalent 100% merino wool fabric, the 200 Sonebula merino round-neck long-sleeve top is insulating, odor-resistant, and offers incredible breathability for all your sporting activities, whatever the weather. Raglan sleeves and underarm gussets enhance freedom of movement, while flat seams throughout the garment guarantee chafe-free comfort. Inspired by nature, icebreaker is a brand that relies on the performance of natural fibers to offer an alternative to garments using petrochemical synthetics. Merino wool is a fiber that renews itself every year, naturally resists odors, facilitates thermal regulation and lets your skin breathe for comfort at all times.