Tianjin Zhengjian Nano-Tech Co., Ltd. is a small and medium enterprise, which is specializing in the production and sales of Tourmaline Underwear, Tourmaline Sock, Tourmaline Pillow, Far Infrared Apparel, Magnet therapy Protector, Far Infrared magnetic Bedding Set, Tourmaline Health Mattress and so on. Also we supply OEM Service, ODM Service and Product entrust development service. We are famous for enormously powerful production, advanced equipment, excellent quality and fine workmanship.