Plum Satin-feel H&M belted dress

Hard to tell from the pics how cute this dress is. Rich plum color, thick belt at waist cinches to create a nice shape. I'm 5'9" and it hit me at the knees. Wore once or twice- paired with tights, boots and sweater and it worked for a party and could also work for the office. I only dry cleaned it, but tag says you can machine wash. Lined. Fabric reminds me of a thick satin, but label says Shell is 50% polyester, 47% cotton 3% spandex. Lining is 100% polyester. Good for cold. Smoke-free home.