One of the most important and revolutionary features of Muck Boot Company footwear is the structured, Breathable Airmesh lining used in all their products. Airmesh is made up of thousands of tiny vertical fibres that allow air to circulate throughout the interior lining surfaces. Excess humidity and perspiration that might build up in the boot are quickly wicked away. This creates a comfortable environment for your feet that lasts for extended periods of use.