Easiest way to detect if there's an RFID tag is to put your shorts in the microwave for 10 seconds. Jokes aside, the only cases I know of where the RFID tag is

Easiest way to detect if there's an RFID tag is to put your shorts in the microwave for 10 seconds. Jokes aside, the only cases I know of where the RFID tag is sewn into the item permanently, is major Hotel chain towels.