1, Comfort: the neckline design of round neck thermal underwear conforms to the curve of human neck, which will not cause oppression on the neck, making it more comfortable to wear, while it is not comfortable to cover the neck.

2, versatile and practical: round neck thermal underwear is suitable for various occasions and seasons, and can be matched with various styles of coats and clothing, which is practical, while the middle collar underwear needs special clothes to match because it wraps the neck.