They are rubber and for my first one I made the mistake of using this little key ring instead of the carabiner which shared one of the connection holes on the top AirTag -Covering. As such, I recommend only attaching these AirTag cases with carabiners, which seems to work pretty well. They are a good buy and I plan to use them in my purse and travel bags but as they are made of rubber I wouldn't use or trust them outside of anything for more than a year.
Deppa Crab 2 holder black
30 Review
Power Bank Storage Case By GLCON - Hard EVA Protective Travel Pouch For Cell Phone, Charging Cable, External Battery & More (Light Green)
31 Review
Stay Cool Anywhere With LEMOISTAR 6-INCH USB Desk Fan: Compact, Quiet And Adjustable!
31 Review
Mafiti 8.5 Inch LCD Writing Tablet: Portable Doodle Board for ๐ Kids & Adults - Perfect for Office Memo, Home Whiteboard & Cyan Drawing
31 Review