The comments read by Mercari's AI from the photos were omitted due to exceeding the character limit. Briefs, Showa Retro, Set of Two, White Briefs, Gunze & Others Gunze YG Series, S Size, 100% Cotton, Unused, New, with age-related deterioration. Sun Olympus, S Size, 100% Cotton, Combed Yarn Used, Operon Rubber Waistband, Unused, New, with age-related deterioration. Manufacturer: Hiramatsu Kogyo. When searched on Google Lens in AI mode, it came up as being sold as the Sunjoy series. The logo is also on the sticker. I've explained that it has nothing to do with the optical equipment company Olympus. Gunze briefs are a classic, and the YG series seems to still be in production, but these are likely old, from the Showa or Heisei era. Recent packaging has a simple logo, like a thin Gothic font, but at that time, there was less Japanese. There are many English words, and the katakana "Gunze" is very small. In contrast, the illustration on the back is a rough sketch, like a scribble, and perhaps this was the American image. Thinking of it as a mirror, the image Japan has of itself might be represented by the sadly small company logo. In terms of design, there are blue lines on the waist rubber and around the legs. It's not all white. Different from another YG series I have listed, it seems to be even older. On the other hand, the Sun Olympus is also 100% cotton, but thinner. In the two-piece set I listed, the other one is thinner compared to the Gunze. However, I don't know about the functionality. There may be reviews saying it's good because it doesn't get stuffy. Operon is a type of rubber, also used in the waistbands of bloomers and training pants. The images may be reduced on the site, so the text may not be readable, but there are types such as flat rubber waistbands, pleated waistbands, and Operon waistbands. The first two are the pleated type, while Operon is woven fabric, like the cuffs of sweatshirts. The tightness is not as harsh because it contacts the skin over a surface, unlike the others where the pleat peaks touch. For practical use, or perhaps for your collection? Thank you very much.