Material Composition: Outer: 100% Polyester; Filling: Duck Down; Lining: 100% Polyester [1] The lining is filled with plenty of voluminous duck down, creating a functional design that enhances cold protection, making it a practical fashion item for winter. [2] Ribbed cuffs/adjustable cuffs prevent wind from entering, providing high heat retention, and there's also an internal pocket for increased safety and convenience. [3] Stand collar: The shape of the collar prevents cold air from entering the body, providing excellent heat retention. The reason it's recommended is that it's warm and windproof when worn. It can be worn for commuting, going to school, and is unisex. It's also recommended as a gift for birthdays, Christmas, etc.