Size: S: head circumference 30, M: head circumference 37, L head circumference 48 Material: PU is durable and non-toxic. The hat has a long service life and can provide the best and best user experience. Easy to wear: Unlike other hats, the cap is easy to wear and saves you a lot of time and effort. effort Warmth: the hat is windproof and can keep the dog warm on the coldest days to prevent his illness Design: the unique appearance can decorate the dogs to make them attractive and become the dog superstars More Choices: There are three colors and enough sizes, and you can choose the favorite color according to your and your dogs’ requirements.