The German Panzer or Tanker suit is fully insulated. It comes as a two piece unit that zips in the front. You may also take out the lining for warmer weather. They are great for snowmobiling, working outside in cold or warmer weather, painting or working on cars, whatever the case, if you need coveralls these are great. They come with or without an opening at the shoulder back (please specify). It was designed for pulling the tankers out of a dangerous situation. Most of them have a German flag on the shoulder.