Are there any markings or indication of origin apart from the German made zips?
At first look, I'd guess 1950s or more likely 1960s.
I agree a 1960s rustic women country or ski suit.
The bell-like shape indicates 60s.
For instance Banff which is in the Canadian Rockies is much colder than Aspen which is in the American Rockies.
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Why are belts more popular for sportswear? Do braces restrict the movement?