What Our Gearhead(R) Experts Are Saying:"This is my go-to base layer for deep winter missions. The heavyweight merino keeps me warm on the skintrack or lift without ever feeling bulky or clammy. The offset seams and gussets are a game-changer for all-day comfort, especially when layering under a pack."When the cold sets in and layering becomes essential, we reach for the Merino 260 Tech 1/2-Zip Top. Crafted with heavyweight 100% merino wool, this piece offers the soft, breathable warmth we need whether we're charging through powder, snowshoeing tree-lined trails, or gearing up for a chilly alpine start. The natural temperature-regulating properties of merino keep us cozy without overheating, and it resists odor so we can keep moving day after day. Details like gusseted underarms and offset shoulder seams help us stay comfortable under packs and outer layers, while flatlock seams prevent irritation during high-output days. The half zip design adds quick ventilation and easy layering versatility. From first tracks to winter treks, this is our foundational piece for serious cold-weather adventure.