Thicker material: The nylon fabric uses high-density webbing to increase durability and ensure the safety of dogs Adjustable size: Adjustable 155-225 length 10 widthSuitable for medium and large dogs or cats please measure your dogcatAs neck circumference before buying Note: The collar will not stretch on its own Never let your dog wear the collar unattended please make sure that only 2 fingers are left between the collar and the dogAs neck Safety buckle: The quick release buckle is made of high-quality sturdy plastic which is lighter than metal buckles and is more comfortable to wear The D ring on the collar allows you to easily add a dog tag or leash Simple color: This collar has a variety of colors to choose from This simple solid color will make your dog look more fashionable when traveling and walking daily