Penelope Turtleneck Open Back Sleeveless Leotard for Girls by Lulli Dancewear. Girls Mock Neck Microfiber Leotard Penelope is a kids' sleeveless turtleneck leotard with a keyhole back. This sophisticated microfiber leotard hugs the body, providing both form and freedom. Ideal for the young dancer seeking a touch of style. Made in Israel.