Thank you for viewing! Warm boa ear muffs to prepare before your ears hurt! They fold up compactly, so they fit neatly in your bag or pocket♪ Many users are fishermen from the north! This type goes around the back of your neck, so your hairstyle won't be ruined! And it's a nice point that it doesn't slip easily♪ With ventilation holes, you can use your smartphone as is! With a simple design, it can be used by people of all ages! There are two sizes for the ear muff part. This is the larger size♪ ▼color→Gray ▽size→Diameter of the ear muff part: Approximately 14cm