Lanvin Men's Footwear Size Chart The Lanvin™ Bumper Ballerina Flat showcase a leather upper, slip-on construction with an elastic topline, and square-toe silhouette. Bow accent at the toe. Leather lining, insole, and outsole. Back side bumpers. Made in Italy. This item may ship with an attached security tag. Merchandise returned without the original security tag attached or a damaged tag may not qualify for a refund. Weight of footwear is based on a single item, not a pair.