In the 1970s, the Canadian military debuted a new parka. With a lightweight nylon shell, detachable synthetic lining, and wool-lined hood, it was all designed for extreme cold.

Military clothing, especially wool pants, sweaters and coats, is well-made and valued by outdoors enthusiasts for its durability and warmth, he says, but it's becoming harder to find.

While most military surplus stores have faded away, Uncle Sam’s Army and Navy Outfitters, between Seneca and Exchange Streets in Buffalo, says it’s the largest such store in North ...