【IPX8 Water-proof Style & Compact Dimension】Taken Off the waterproof ring style for a more compact measurement. However water resistant to IPX8. We've developed a water-proof line on the inside edge of the item (integrated into the item) making sure that h2o are unable to penetrate providing the screws are tightened. https://www.wanderlustprogear.com/products/airtag-dog-collar-adjustable-for-apple-airtag-silicone-case-designer-collar-for-small-medium-large-dog-pet-gps-accessories