Quality Materials: The dog collar is made of neoprene and nylon, which are not harmful to the dog's health. The high-strength sewn nylon fabric is extremely durable, and the collar is equipped with soft neoprene padding inside for a comfortable fit.Airtag Collar: This dog collar fits perfectly with the Apple AirTag and you do not need to purchase a separate stand. It fits perfectly with the Airtag and does not come off easily. The Airtag is not included in the package. The entire Package Includes: AirTag Dog Collar x 1.Details: The extra strong reinforced buckle can withstand a maximum tension of 130kg and will not come off easily. The buckle can be opened quickly and safely with one hand. The O-ring can be easily connected to a leash or carrier, and the one-piece design is practical when traveling.Safe and Practical: The reflective strip on the outside of the dog collar reflects light in the dark to keep the dog safe. Dog airtag collars feature a bell whose sound helps you spot the dog faster.Please measure the dog's neck before purchase.S size: 2.5 * 30-37cm M size: 3.0 * 37-45cm L size: 3.0 * 43-50cm XL size: 3.0 * 48-55cm