United Arrows It's made of a flannel-like fabric. It's warm. Please refer to the product images for details. Thank you very much. A soft, light gray button-up long-sleeved shirt. - Color: Light gray - Design: Button-up shirt - Pockets: One chest pocket on the left - Material: Soft fabric - Sleeves: Long sleeves Thank you for viewing. Size: M Color: Gray系 (Gray-based) Pattern: Solid Collar Design: Button-down (BD) Stains, tears, odors, etc.: None