Men's slate grey long-sleeve performance top with poly-mesh exterior and and Merino wool interior, which provides natural insulation and moisture wicking qualities. Featuring contrasting tonal mesh panels for extra breathability, this mid-weight top is expertly finished with a concealed rear zip-pocket, tonal flat-lock stitching throughout and black '531' logo on the shoulder. In addition, a heavier handle allows this piece to blur the lines between performance and casual. Read more about the 531 Collection. Woven 60% Wool, 40% Polyester. Machine washable. Regular-Fit. Fits true to size.