1.Dog Collar with Airtag Holder - DERLOW dog collar has Air tag protector, no need to buy additional Airtag holder. All-in-one design. It's more durable than reinstalling the Airtag holder, no worries about the airtag shaking and falling off. Keep track of where your dog is.2. SAFE AND SOFT MATERIALS - DERLOW reflective dog collars have soft neoprene padding inside and 1000D nylon outside. The material is durable, quick-drying, breathable, soft, and won't interfere with your dog's movement, keeping it in a happy mood. Metal O-rings make the pulling process stronger and less prone to breakage. Our dog collars have four reflective strips around the edges, making it easy to know where your dog is at night.3. Quick Release Dog Collar - The quick release buckle can lock and unlock quickly. Powerful and easy to use. A screwdriver is included in the package for quick installation of the airtag.4. Multiple options When you go out, climb or jog, you don't have to worry about losing your dog. Suitable for Labrador, Golden Retriever, Border Collie, etc.