Vintage Koret Petite Navy Floral Shirt Jacket

Is it a shirt? Is it a jacket? Is this the vintage version of a shacket? Navy blue with a cute, white and purple flower print. Excellent condition. No signs of wear. Thick material (similar weight to a denim jacket). Snap, button front. Collar. Material is 97% cotton and 3% spandex. Great piece to add to your vintage collection!