This seamless long-sleeve tee features ultra-soft, ethical 17.5-micron Australian Merino wool enhanced with durable LincSpun™ technology. Its 3D-knit construction eliminates seams to prevent chafing, while strategically placed mesh zones improve ventilation in heat-prone areas. Designed for a close, flexible fit with integrated thumbholes, it offers comfort and secure sleeve placement during intense activities. Reflective details enhance visibility in low light, making it ideal for performance-focused runners seeking natural warmth and breathability.