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Icebreaker offers a variety of men’s flannel and casual shirts that are naturally odor-resistant and sustainably sourced. Made from the finest merino wool, our men’s shirts keep you comfortable – even in the most extreme weather conditions. Our merino wool shirts release your natural body heat through air pockets, keeping you cool in the heat and warm in the cold. Shop a variety of styles including flannels, polos and tees. Pair our shirts with our assortment of men’s pants for a look that is stylish and functional.