Men’s hat in waterproof and breathable ultralight 2 Layer Aqua Block fabric, with 2 mm water column waterproof (WP) rating and 2 mm breathability rating (MP), windproof, a soft hand feel and long-lasting water repellent finish. The internally-taped stitching guarantees excellent waterproofing, even in the worst weather. The internal mesh lining ensures excellent breathability.100% Polyamide.