Ruban D’Or Wool Crepe Sheath Dress / Size 38

After 20 years as a textile designer, my estimate is that this is pure wool. No content tag however to verify. Flawless crepe weave. Fully lined. Stitching detail around neckline. French 38 - US 4 but see measurements: Shoulder to shoulder - 13” Arm pit to arm pit - 16.5” Waist - 14” Hips - 17” Length - 34”