Men's boxer brirfs 1)OEM,ODM and R&D serive 2)delivery within 5 days after your payment 3)we have our own fa Men's boxer brirfs Specification:S,M,L,XL,XXL,XXXLColor:blackMaterial:1) fiber(60%far infrared fiber and 40%negative ion fiber)2) magnet3) Bamboo charcoal and nano negative ion antibacterial fiberThis product uses the high technology fabric based on biological technology.According to human ...