This is an Acne Studios shearling rider's jacket. It's a women's model, so this size is quite rare. I often see sizes 32-38, but a 40 is hardly ever available. As you can see from the tag, it was purchased at the Aoyama store. I don't think they make fake shearling, but if you're concerned, you can have it authenticated after purchase. This color is the most versatile, and it's the perfect size for men. It's currently discounted because it's not in season, but Acne's popularity is increasing, even with denim, and the retail price is also going up, so please consider this.