Tougher than the job you re doing, the Iron-Tuff Siberian can handle subzero temps and daily wear and tear thanks to bound seems and rivets for reinforcement. The jacket s slightly longer, fingertip length is perfect for protecting your entire torso, and the "built-to-last" construction will give you years of reliable use. The iconic Iron-Tuff Siberian is Comfort Rated down to -50°F has been trusted by millions over the decades to keep them warm and productive in the harshest cold environments. When you need the best cold weather gear for the hardest jobs, you need the protection of the Iron-Tuff Siberian.Sizing Instructions: For the most accurate fit, take your measurements over the base layer of clothing you intend to wear with this RefrigiWear gear (such as thermal underwear, jeans or a sweatshirt) and refer to the size chart for this product.