Thank you for viewing. ARN-1023M (DBSV) This is a very rare men's XO size. FINA-approved product. We sincerely apologize, but please understand that we cannot offer a discount on this item. We guarantee that it is unopened and unused, brand new. The price includes nationwide shipping. We can ship immediately. Below is a quote from the official explanation: The "AQUA ADVANCED" series is recommended for swimmers competing in regional competitions. This is a FINA (International Swimming Federation) approved model required to compete in official competitions. By placing polyurethane horizontally around the body, and using the material "AQUA XTREME," which has approximately 5% higher vertical elongation compared to the conventional model "X-PYTHON2," this competitive swimwear model made of knit material pursues ease of swimming.