Designers Originals Lightweight Knit Top PL Ivory

Designers Originals, lightweight knit sweater. Size Petite Large (PL) 65/35 Rayon/Nylon Owned by myself. It has 7 small brown spots/stains on back of sleeve and I don't know what it is. I don't remember it happening. It is Ivory White color. Pretty floral reverse weave design. Plain on backside. 3 pearled buttons