Elegance & Comfort : Crafted from vintage style PU leather and golden metal fitting, features long-lasting, easy to clean. Cotton lining prevents skin irritation, ideal for sensitive dogs. Thoughtful design combines classic aesthetics with pet comforts to ensure your furry friend stays comfortable during walks or adventures Waterproof AirTag Holder : AirTag holder on padded dog collar features enclosed silicone holder allowing for IP68 Waterproof, so you don't need worry about getting the AirTag wet when your pet plays outside Anti-Lost QR Code : Locking buckle come with a WhoseID QR code that enables to customize pet's online ID profile, help quickly contact owner when pet is lost and found by others, and provide dual security for pets with AirTag Double-layer Webbing : Dog airtag collar interior is Soft and comfortable cotton padding, the exterior in premium smooth PU leather, double webbing keeps collar durable, pretty, and wearing comfortably Size : Small ¾"W, Adjustable Length 12"-15". Medium 1"W, Adjustable Length 13"-22". Large 1"W, Adjustable Length 16"-26". Suitable for puppy, small, medium and large dogs WhoseID AirTag Dog Collar features premium silicone holder for IP68 waterproof protection, soft cotton padding for comfort, and a durable PU leather exterior with double webbing. It includes a QR code buckle for easy identification and is adjustable in medium and large sizes to fit all dog breeds, from puppies to large dogs.