I have Boomerangs for my dogs. I love them! We opted for the plastic ones, and they have held up beautifully. Still look new even after almost 6 years.I got mine at http://www.boomerangtags.com/, they have some REALLY nice ones that slip right on the collar like a belt buckle, so it doesn't jingle and can't get caught on things or fall off. They've got great reviews... And they accept PayPal.