What Our Gearhead(R) Experts Are Saying:"The Tista 1/2-Zip Top has become my first layer on just about every cold-weather Nordic outing because the carbonized coconut charcoal construction keeps me warm and odor-free through hard efforts without ever feeling clammy. The tall collar and half zip let me dial in ventilation exactly where I need it when the pace picks up on the groomed track."The Swix Tista 1/2-Zip Top is built from 84% recycled carbonized coconut charcoal yarn that brings natural odor control, moisture wicking, and reliable midweight insulation to every cold-weather outing on the Nordic trail. The slim fit layers cleanly over a tank or under a shell, and the half-zip front and tall mock collar give you the ventilation control to stay comfortable whether you are pushing hard on a groomed track or moving at a steadier pace on a touring day. Flatlock seams sit flat against the skin through hours of active use without any irritation.