Hello "Big Rich"..
I am fairly certain the Sandstone Jackson Coat in question has the Sherpa Lining(Black sorta like wool) I don't have this exact Coat however I do have a Sherpa Lined Jacket that is light Biege/tan that is quite warm and comfortable... Carhartt Duck Type fabric is, well the closest to it would be a Tent... Carhartt. Uses I believe 12 oz Duck fabric when constructing the coat & jacket.
In double checking My Brother has the coat you are asking about... He told me that it is very warm and the length is very adequate.. The Fabric stands up to day to day work abuse.. Although not stated as rain gear it tends to repel water very well...
Personally, I feel that the material & construction will give you years of service duty & warmth.!!! Wear it in good health...
P.S. Plenty of pockets for your "Doo-dads"....
Currently we only have this available in the Army Green size 4XL. Due to the nature of the closeout business, we often receive items in limited quantities. Therefore, popular sizes and colors can sell out quickly. Occasionally we are able to reorder a product, but closeout items are typically unable to be reordered. We suggest signing up for the My Updates as the best way to monitor incoming products. You will receive email notifications of our newest stock items.
Shipping information can be viewed here: http://www.sierratradingpost.com/lp2/shipping-policy/#usshippingrates/?osid=footer-_-shipping-rates-_-101315