Petar Petrov Karen Sweater in Blue. - size 42 (also in ) 100% merino wool. Made in Slovenia. Hand wash. Fine rib knit fabric. PETA-WK6. KAREN R19K6. About the designer: After graduating from the University of Applied Arts in Vienna, Belgian designer Petar Petrov applied his fashion skills to costume design before delving into the world of menswear. Petrov is known for a healthy mix of quirk and classic, combining traditional sportswear elements with playful graphics and color.