"Can RFID tags be sewn into clothing?"
"Yes. A number of companies make RFID tags encased in protective plastic. These tags are designed for use in the laundry and uniform rental business. The tags used are typically 13.56 MHz tags, which have a read range of less than 3 feet (1 meter). Today, there is no way to embed a tag that is undetectable to the consumer into clothes. Companies that are testing RFID systems for tracking clothes in the supply chain are putting the RFID transponder on a hangtag that the consumer cuts off before wearing the item."