Excellent performance. Two JP3100 sets, one blue and one black. The black one shows signs of use, but I personally don't think it's very noticeable. For some reason, the black one has a zipper inside. The inside seems clean, and the white appearance is likely due to light reflection. Please make your judgment based on the photos. If you have any questions about the photos, please feel free to comment, and I will answer them. I would appreciate it if you could purchase after you are satisfied. If purchased separately, it will be more expensive due to shipping costs. The black one is 2000 yen, and the blue one is 2500 yen. I don't have a box of a good size, and it seems difficult to pack. I will do my best to pack it carefully, but it may only be packed with bubble wrap. Thank you for your understanding.