Luna Sandals Retro Oso Flaco US9.5 (27.5cm) Only tried on, never actually run in. Rare item. We are waiting for your purchase if you can understand that this is a used item. It will be shipped in simple packaging. Product Description Original version, not the Winged Edition of Oso Flaco. This sandal has the most aggressive tread pattern for crazy grip, features the original racing system, and is for those seeking ultra-flexibility, complete ground feel, and the best durability.