The lining is lined with a warm boa that provides excellent heat retention and protects your neck from the cold.
From the Manufacturer
The fluffy boa is warm and compact to carry earmuffs.
506 Earmuffs
A compact ear warmer (ear pads) that uses a fluffy boa on the back for easy carrying.The ribs are made of highly elastic polypropylene, which is lightweight and comfortable to wear.Since it can be worn from the back, you can also use it with a hat.The simple design is recommended for both men and women of all ages.It can also be used for a wide variety of purposes such as work, outdoor activities, snowboarding, and other sports.