Fabric ID....30s-40s Sun Suit

Mary Jane has helped with dating this home made sun suit to the 1930s-40's but can someone help with fabric weave and poss content. Feels crepey and cool. Matt black and white with color's in silky threads. Is this a brocade? Reminds me of vintage curtain fabric. Weave/design comes through to back, if you can see the inside of the bottoms there are color stripes. Thank you in advance.

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