Navy pea coat is a cold weather garment issued for the navy. These coats are initially made using coarse, thick pilot cloth. Pea coats became enduring fashion clothing apparel and most fashion clothing manufacturers make coats according to the regulation of the design of the pea coat. If you are looking for a genuine pea coat of the US Navy, there are some important things you should look for to ensure the authenticity of the coat you want to purchase.