Adjustable Dog Collar: There is a strap on the opening of the collar for you to adjust it to your pet. There are three sizes to choose from: collar S for neck circumference 15-23; collar M for neck circumference 20-30; L collar for neck circumference 32-45. Function: The recovery collar is specially designed for pets to wear after surgery or during illness to prevent them from scratching wounds and areas affected. Removable: The inner and outer ring is detachable with zipper, more convenient and quick to clean. Easy to store: The inflatable hole is simple and convenient, and you can blow directly with your mouth, preferably with a balloon pump. When you don't need to use it, you can deflate it and store it, saving space. Soft and bite-resistant: the outer ring is made of soft short plush, soft and comfortable, and does not affect meals and sleep when worn.