1.Material: The SYOSIN earmuffs are made of flannel. This material's earmuffs provide better warmth and make your ears more comfortable. What's more, SYOSIN earmuffs can effectively protect your ears from cold gusts.

2. The lightweight, portable design of this earmuff makes them a good complement to outdoor activities such as hiking, running, cycling, skiing, travel, outdoor work and so much more!

3. Size- Size is important to make sure that earmuffs fit comfortably and stay on securely. The majority of adults fit in sizes Medium and Large and most children need a Small. Please follow the sizing chart and get an accurate sizing of your ear. Small: 2 inches -2.36 inches, Medium: 2.36 inches -2.75 inches, Large: over 2.75 inches. （Choose small one if you are in between sizes.）

4. Exquisite Craft and Reliable quality. Great gifts for your friends and families. Good shopping options for family members, friends, or roommates daily wearing needs.

5.If this product have any problem, Please tell us.We will provide you with a nice solution.