NWOT - Size 6.5 Onitsuka Tiger Serrano shoes in Women's 6.5 I love these shoes, but need to clear out my closet. The SERRANO® model was inspired by the track spikes of the 1970's, carrying the tradition of the brand's racing customs with its overall silhouette, which features a lightweight nylon upper and a textured rubber outsole that mimics the spikes of a track and field shoe. Accenting the heel and toecap are the dual-overlay suede textures and a padded tongue and collar for comfort in what used to be a performance track shoe for racing.