The matrix system jacket changes with the seasons. An H2xtreme waterproof/breathable outer shell with articulated elbows, to allow for a full range of movement, and fully sealed seams to ensure the jacket stays watertight. Works in synergy with a lightweight and thermally robust, interchangeable thermal shell liner that zips in and out as required.Washing InstructionsMachine wash cold. Do not tumble dry. Do not iron.