100% Merino Wool - Soft wool that resists moisture and provides warmth even if wet. High Zippered Collar - A tall collar for extra wind protection, and a half-zip closure for optional venting. Flatlock Seams - Seams that rest flat against the body, improving comfort and eliminating any potential pressure-points. Material: 100% Merino Wool Warmth Level: Warm Sleeve Length: Long Sleeve Style: Half-Zip