Granite II Jacket - ReversibleThe Granite is not just another puffy. Its a lightweight technical piece that keeps you comfortable in a wide range of conditions. The Granite has 37. 5 sixty gram insulation which retains body heat, while 37. 5 active particles embedded in the insulation accelerate vapor movement and prevent overheating and moisture build up. Further, 37. 5 technology is sustainable and never washes out or gets tired. 37. 5 technology removes moisture before it turns