Thank you for viewing. This is a men's competitive swimming practice swimsuit, a Toughsuit training brief, from Arena. Product number: SAR-4108, BKBL color, O size Price including tax: ¥5940 It is a new, unused item, only photographed, so I believe you can use it with pleasure. If you are looking for one, please consider it. I am sorry, but please understand that I cannot offer a discount on this item. The following is a quote from Arena's official explanation: The TOUGHSUIT series uses "Toughskin T2E," a recycled polyester material that is environmentally friendly. It is chlorine resistant and long-lasting, making it a recommended practice swimsuit for swimmers who train frequently. The design features Arena's iconic team line tape (sublimation) on the sides. BKBL is a new color with a team line tape featuring a Personalize theme pattern.