Soft PU Leather,sweat-proof,scratch-resistant and durable in use;an easy to open/close spring ring clasp help to quick lock/unlock.This airtag protective case come with keychain,you can attach it to your car key,your bag,child's schoolbag,dog leash,the valuables and more.Protecive case compatible with Apple New AirTag Keychain, The case fits tightly around your AirTag,so you can keep track of whatever it's attached to. 1.57" L x 3.54" W