The Katana is a flat-lasted shoe with a slightly downturned, moderately asymmetrical shape (the PD 55 last). It has a suede and microfiber upper that stretches a little but holds its shape well thanks to the P3 system. It's generally recommended to size down 1–3 EU sizes from your street shoe, depending on whether you want a performance fit or all-day comfort. The Velcro version is a bit softer and different in shape than the Lace version, which is stiffer and more technical.