In short, Mountain Equipment Co-op was founded in Vancouver, BC circa 1971 by a group of individuals sick of crossing the border to shop at REI in Seattle. This malcontent for border crossings and a passion for quality outdoor goods has led to the MEC to become one of the largest co-ops of outdoorsmen in the world. The Co-op is still in operation today making gear for its user/owners with the same enthusiasm as they had 40 years ago.
The parka seen here from the early to mid 1970s is very similar to what one would have found at REI during the same time period. It is made of a 65/35 cotton/poly blend, in an ever popular color combination for the time. What excites me the most about this parka is the thought that went in to the lining. Both the lower half of the torso and sleeves are lined in a light nylon. This allows for much freer movement as friction between the parka and any under layer is greatly reduced. The alternating of Navy and Khaki is quite nice as well.
The parka appears to have been produced under contract by Winner Sportswear LTD of Vancouver. Using local and foreign manufactures to produce items is common amongst Co-ops. Here you can see a later parka contracted by REI from Korean manufacturer Natural Comfort.