To absorb elevation change and intense outings in the mountains in spring/autumn, this technical tee base layer with a dual design is worn next to the skin for optimized wicking during serious exertio n. Extremely light POLARTEC® SILKWEIGHT SOLID is a super-smooth primary component, making the LTK INTENSE ZIP exceptionally comfortable. It meets the requirement of high in-action breathability, with a distinctive feature: a lighter, airier honeycomb knit under the arms. The result: accelerated wicking to keep the body dry during alpine performance, boostable on uphill sections by the half-zip collar. The clean-cut design, flatlock seams and ergonomic fit, with seamless shoulders, help you kick on fast. In use, the anti-odor POLYGIENE® treatment is welcome for inhibiting bacteria build-up, as are the eco-friendly LOW IMPACT™ label plus hi-vis markings to keep you safely visible in low light.