Simply stick these on your clothes to absorb sweat and prevent sweat stains. They have antibacterial and deodorizing effects, and the black color makes them less noticeable. A great deal with a set of 2 boxes. Although new and unused, these were previously sold in stores, and the price tag stickers have been removed. This may have left marks on the packaging. Due to the long storage period, there may be traces of sticker removal, slight discoloration, or dullness on the outer box. Instant purchase OK. Please refrain from purchasing if you are overly concerned about these details.