This is a bandana for pets. It is a free size, with a neck circumference of approximately 42cm and a length of approximately 13cm. It becomes cool when wet with water. It can also be hand-washed. It's an eco-friendly neck cooler that cools down with just water. It's a summer item that utilizes evaporative cooling. It's a simple product, but we hope you'll consider it. You can tighten it according to the size of the neck, so it can be used for dogs, cats, and various other purposes.