Durable Material- All Day Comfort. Our dog collar is made from durable nylon material, soft and lightweight, also easy to wash, provides a better experience for playful dogs; suitable for any outdoors to resist the forces of the most powerful medium and large dogs.No Tangle Design- Upgrade your dog-walking experience. Adjustable 360 degree free swivel D ring, allows for auto adjusting when you fasten leash onto the collar, no limitation for your dogs while moving from side to side without messing the leash, so dogs can travel happily and easily.Safe Design- Be the best partner of your pets. 2 lines of reflective dog collars threads, stay safe and increase visibility; easily go for a walk, jog and train whether it's at night or early in the morning, no worry about your dog getting hurt in the dark without being seen.Release Buckle- Easy to put on and take off. The collars buckle uses specifically sturdy plastic, the quick release buckle is not easy to wear and tear, so tough enough to make a good closure; for its light weight, it only takes a few minutes to get dressed well.Adjustable Size- More choice for your dogs. With the smoother heavy duty hardware,you can adjust the length of collar with less effort; Please leave a space of 2 fingers between the collar and dogs neck, allow for breathing but not too loose, make sure the dog doesn't take the collar off itself and bite it with their sharp teeth.