Good condition men’s kuiu shirt jacket The Insulated Snap Shirt is filled with 40 grams of Toray 3DeFX+ continuous fiber active insulation. The long spiral strands of hydrophobic fill add loft and warmth, and don't require the face fabric to be coated. This uncoated fabric is incredibly comfortable against your skin and practically silent.image Constructed with a sleek quilted pattern, this jacket can be worn in the field as a mid-layer or as everyday wear. Two open hand pockets and two snap closure chest pockets provide warmth for your hands and storage for quickly accessible items. With a comfortable feel and light insulation this versatile jacket is a must-have for any occasion.