The original 60/40 mountain parka by Sierra Designs. Constructed of the fabric famed for its day as the superior protector against the elements. In a time before Gore-Tex and other such membrane backed fabrics, this blend of Nylon and Cotton loomed with a tight weave was the number one choice of outdoor enthusiast against rain, snow and wind. Prior to its introduction in 1968 most parkas of this style were made of a Polyester and Cotton blend which was much more permeable to the elements. This particular example is an earlier version evident by the sparse labeling and lack of embossed buttons.
The parka is constructed of a Navy Blue shell made entirely of the 60/40 material. The classic construction includes two hip pockets with side entry and Velcro closed top entry. Two bellowed chest pockets also with Velcro closure. A single zip closed back pocket which opens up to the entire upper half of the jacket body. Closure consists of a large gauge YKK zipper with extended pull for ease of use while wearing gloves. Also a snap close-storm flap. Features an integrated hood with offset seams to prevent pooling around the neck and shoulders. Inside the khaki liner is made from 60/40 up top and through out the sleeves and hood to further guard against the elements where it matters most. Then a lighter nylon lighter around the lower allowing the jacket to slide easily over the hips. Nylon cord cinch runs through the hood with leather lace locks. Also a Nylon draw cord at the waist which most likely also had the leather locks at some point, but are now missing.