1. Double-sided material design, one side is ice silk, the other side is mesh, one side is cool and the other side is warm, double-sided wear. 2. The ice silk surface is cool and comfortable, smooth and breathable, suitable for summer wear 3. Mesh fabric is warm and soft, suitable for winter wear 4. Breathable and skin-friendly fabric, no pressure on the eyes, no peculiar smell on the tip of the nose 5. Soft silicone ear buckle design, more intimate without grinding the ears 6. Size: 22 x 10cm