Nº21 Billy Satin Sneaker In Neutral Size 37. Step in style by wearing these billy sneakers from N°21. Made from leather and satin, these sneakers look elegant. This footwear has detailed metal eyelets and front laced closure that provides a firm grip. For a casual look, these sneakers can be combined with a pair of jeans and T-shirt. - RUBBER SOLE: 4 CM - DETAIL OF METAL EYELETS - LEATHER LINING AND INSOLE