Its like a vest only better now available in womens fit with the weight and packability of a light wind vest this piece adds wind protection over the shoulders and upper arms plus protection from light rain with our norain light stretch fabric features windshield 3l stretch windproof fabric on front shoulders and upper arms norain light fabric on forearms and back for water repellency breathability and stretch ykk vislon main zipper with wind flap zippered openings for access