Review on Get a Fluorescent Set of 4 Soft TPU Cases for Apple AirTags - Protective, Lightweight, and Waterproof with Key Ring for Convenient Tracking and Security by David Boone

Bought a few to carry Air Tags with me. I put collars on my dog. At first they worked very well, but after a few months I noticed that they were losing their ability to remain fully leakproof. At first it started with slightly noticeable moisture, then they just collected water. I thought it might just be due to the dogs' high level of activity, but the one I keep in my purse doesn't seem to stay tightly shut either. I find that just movement and use over time will cause the plastic to warp slightly. This leads to a reduction in compression. You get what you pay for I guess which is why I'm giving them 4 stars. They are still very reliable air tag cases despite not being waterproof.