The FXR Men's Vapor Merino Longsleeve delivers lightweight warmth, moisture management, and next-to-skin comfort for active cold-weather layering. Built from a mid-weight 180gsm knit with 20% Merino and 80% performance polyester, it helps maintain warmth when wet while providing fast-drying performance. The contour fit enhances moisture wicking, while antibacterial and anti-static properties support comfortable extended wear. Tonal flat-lock seams create a smooth, streamlined feel against the skin, and thumbhole cuffs help keep the sleeves securely in place. A longer body length helps reduce midriff exposure during movement and layering, while screen printed and woven label logos with Thermalweld accents complete the technical design.