The air tag holder is made of soft silicone, which is scratch-resistant, washable, portable and lightweight, Suitable for Dog Collar Size between 1.5-3.5cm(0.6-1.4inch)>Stable & Anti-lost< To avoid accidental loss of your loves, this air tag cover could be stably attached your pets'collars, and simultaneously Air Tag is also protected by the holder, from being falling out.>Practical & Simple< Just need to put collar or straps through our air tag holder without locking or unlocking carabiners/keychain.Also easily be attatched to the strap of your backpack.>Perfect for Airtags< This durable holder fits your Air Tag impeccably, without applying any negative influence on the signal funtion of airtags.>Multiple Colors< Choose from More colour options to represent your lifestyle: Serenity, Youthfulness, Optimism, Passion and Sophistication.