Exclusive to Sugar River Outfitters, the New Blundstone 410 coming in with two options. The 410 feature the traditional 2.5mm thick tough leather uppers and are meant to take a beating. Even the sole, which is an upgrade from the dual density PU to a PU mid-sole and TPU outer sole, is build to get you through any job site or down any road. If you are working hard or hardly working in the BL410 you can rest assured your foot will stay dry and comfortable with a Drylex liner to wick away any moisture from your foot and leather that has been treated with a water repellent to keep water out. The first option is the ultra comfortable BL490 insole, which feature two poron inserts for superb cushion and support. This option is therefore fittingly called the BL410C or Comfort. While the second option offers not only the BL490 insole, but also a fleece insole which will have your feet thinking they are in your favorite slippers all day long. This slipper like insole will ensure your feet will stay warm even in the coldest of weather. The only problem you may find is your slippers maybe not feel as comfortable anymore.