This is an advertisement for a "Soft Mesh Dog Elizabethan Collar, Lightweight, Breathable, for Medium Dogs, Prevents Licking, Size L, 38cm-44cm, Adjustable." It is used to protect the affected area and supports a smooth recovery without stress. It has a cushion that gently wraps the face, and can be finely adjusted with Velcro. It uses a mesh material with good breathability, so your dog will be comfortable. Color: Outer Blue, Inner Green Size: L Neck circumference: Approximately 38cm-44cm For medium to large dogs *Please refer to the reference images for details. Also, please note that there may be slight variations in size.