We can't recommend Icebreaker t-shirts highly enough due to the superb merino wool fabric that Icebreaker clothing is famous for. This truly is one of natures finest fabrics and perfect for layers directly in contact with the skin. The t-shirts below are 100% ultralight merino wool and are an excellent option for traveling in hotter climates or as a first layer during active use. These t-shirts are highly breathable, moisture wicking and odour resistant.