Rare S size (equivalent to Japanese M size). Not sold in Japan. Recommended for everyday use, as well as for those who play sports. The fabric is high quality and feels good against the skin. Perfect as a gift for a loved one, or for a Christmas present. New, unused, and unopened. Although I have stored it with care, there is damage to the outer box from the time of purchase, and there is some soiling on the fabric of the underwear that corresponds to the hole for quality check on the back of the box. I think it's a stain that can be removed by washing, but please understand this before purchasing. Please note that we cannot accept returns or exchanges for new, unopened items. Please consider that there may be damage to the outer box and soiling on the underwear fabric that corresponds to the quality check hole. The images are of one of the items in stock. Please note that the product delivered may not be in exactly the same condition. Calvin Klein CK jockstrap Men's underwear, underwear, sports innerwear Gym, training, present, split-butt, supporter Calvin Klein Calvin Klein CK Men's Underwear Underwear Briefs Boxer Briefs Pants Shorts Sports Innerwear Sports Underwear Training Wear Gym Wear Fitness Athletic Running Workout Muscle training jockstrap jockstrap supporter athletic supporter sports supporter front opening low rise low rise pants underwear sports fashion men's fashion street set sale bulk sale new unused unopened genuine overseas model rare size S size small size gift present Christmas birthday gift