This is a Millet Alpha Light Sweatshirt, which uses Polartec® Alpha®, originally developed for the US Special Forces. The item for sale is an older model without a chest pocket. This base/insulation sweat crew is designed to be worn all day, from town to the outdoors, and offers warmth, breathability, and stretch. It's a thin insulation layer that can be used as a mid-layer or outer layer depending on the situation. The fabric, which sandwiches the "Polartec Alpha" insulation (known for its moderate warmth and excellent breathability, providing outstanding sweat management) between quick-drying Drynamic Air Mesh material, keeps you comfortable whether you're standing still or moving in the cold. ■Materials Outer: DRYNAMIC AIR MESH (100% Polyester) Lining: 100% Polyester Insulation: Polartec Alpha (100% Polyester) ■Size: EURO M (Japanese size L) Length 67cm x Width 50cm These are actual measurements. Please allow for slight variations. ■Condition: There is a fray on the right side of the abdomen (top left in the photo) and a fray at the base of the left sleeve. Please check photos 11, 12, and 13. Please refrain from purchasing if you are concerned about the quality or storage condition, as this is a used item.