Made primarily from merino wool blended with quick-drying fabric, it dries faster than regular wool, keeping the body dry and comfortable during activities. The fabric's bottom has a fluffy grid structure that achieves a high warmth-to-weight ratio while maintaining high breathability, ensuring comfort during cold-weather outdoor activities. The fibers of wool effectively lock in bacteria that cause odors, providing antibacterial and odor-eliminating effects. The half-zip structure increases ventilation, helping to quickly regulate body temperature and dissipate heat during physical activities. Regular Fit This is a multi-performance wool functional long-sleeved T-shirt designed specifically for moderate-intensity outdoor activities in mid/high altitude or cool/cold weather conditions. It features warmth retention, breathability, quick-drying, antibacterial odor elimination, and soft comfort. It can help regulate body temperature under various conditions and prevent heat loss and energy depletion.