The collar has an adjustable strap to fit your large breed comfortably. Featuring a formfitting and lightweight design, this SaharaCase silicone dog collar provides a snug and secure fit.Compatible with Apple AirTagKeep your dog safe using the Apple AirTag technology.Triple silicone materialEnsures reduced stretching and yellowing and guards against scratches and dirt.Adjustable strapIt can be easily adjusted from 16" to 20" in diameter.Formfitting and lightweight designProvides a snug and secure fit.Apple AirTag sold separately.