The Mountain Hardwear Men's Hooded Compressor Jacket is a synthetic, Thermic Micro insulated piece, that is highly compressible and extremely warm. Micro Climate Technology give you more insulation where you need it most, while also proving for greater compressibility. The Nylon ripstop material on the exterior, also give more strength than your average insulated layer. Don't let cold weather stop you, try the Mountain Hardwear Men's Hooded Compressor Jacket.