Vintage seventies Evelyn Pearson chevron maxi dress

Vintage seventies Evelyn Pearson brand maxi dress with cool chevron pattern in shades of tan, red-orange, blue, green, and white. Item is in great vintage condition- no stains, holes, or bad smell. One tiny snag in fabric as shown. ILGWU union tag present and talon zipper but no size or material listed. Fabric does feel as though it could be 100% cotton but not known for sure. Measurements shown and material at bust and empire waist does not stretch, but dress widens under empire waistband and flows away from body. Please review photos and ask any questions you have before purchasing.