Global Tag FOAMY is a RFID tag with foam layer. Very cheap, this tag is perfectly adherent on all the surfaces.
UHF Foam Sticker RFID Anti-metal Soft Foam UHF Printable Coated Paper Tag Expoxy Suface Waterproof A
FOAMY - RFID and NFC Foam tag - Global Tag Srl
RFID Foam Tag
Integrated RFID tags in polymer injection molding
RFID HF and NFC label 40x70 mm - Global Tag Srl
RFID Tag Manufacturer NFC Tags, Passive and Active RFID Tags
Passive Washable PPS RFID Laundry Tag for Textile Tracking - HUAYUAN
RFID HF and NFC label 50x80 mm - Global Tag Srl
RFID HF and NFC label 33x66mm - Global Tag Srl
Make your own NFC data cufflinks - Raspberry Pi