Waterproof Leather Uppers
Work boots made with waterproof leather are treated with an external layer of waterproofing protection to keep your feet dry. External waterproofing also helps resist salt stains that is common in winter and helps to protect the breakdown of the leather uppers, due to winter's harsh elements. If the leather uppers on your boots are not made with waterproof leather and you decide to treat them yourself, you must only use the waterproofing treatment recommended by the boot's manufacturer. Using the wrong type of waterproofing treatment can actually block the breathability of internal waterproof systems and effect their performance.
Welt Seals
Winter Work Boots that boast a welt seal have the added advantage of having an extra layer of protection to prevent water from seeping into the boots. A welt seal is simply a bead of rubber adhesive compound that is piped over the seams, stitching and welts of the boots (which is right along where the uppers meet the outsoles) It is an extra line of defense to seal out nature's elements, such as; water, icy rain, sleet and snow.
Removable Boot Liners
If your feet tend to sweat a lot deep down in your winter work boots, consider purchasing a style that has removable boot liners. This way you can pull them out each night after work and let them air dry completely. Some workers even keep an extra set of liners on hand, so they can switch them out when needed.
Boot Dryers
Boot dryers work fast and effectively to dry out the interiors of work boots after working out in the elements. Work boots are inverted over heated rods to dry them out deep within the toe box areas of the boots.
Merino Wool Socks
Purchasing work socks made with a blend of non-itchy Merino Wool is a worthy investment. Merino wool will not collect and hold sweat against your skin like a cotton sock would, so your feet stay dry and comfortable. While the cost may be higher, they are more durable and hold up better than more conventional work socks.