Thin RFID (Radio Frequency Identification) tags that are waterproof, made of materials able to withstand high pressure, hot and cold temperatures, and durable enough for a wide variety of applications, including being attached, affixed to, woven in, or otherwise enclosed within clothing, towels, linen, or other laundry, or affixed to other products, including consumer products, food products, and other goods and inventory. The tags have up to two antennas printed from a conductive ink solution comprising DuPont e782 Silver ink, graphite, and neodymium on a substrate foil made of materials including ST505 PET polymide, polyester, kapton, or a combination of ST505 PET polymide and kapton, Information stored on such RFID tags can be read using a variety UHF readers or a smartphones using RFID or Bluetooth or other forms of wireless communication.