No hiker does without the onion principle when it comes to braving the weather. This Columbia synthetic down vest is one of your onion layers that will keep you warm. Should the rain catch you, its water-repellent surface will make it roll off. The hybrid material offers you sufficient freedom of movement and wearing comfort thanks to its stretch. It is also breathable, so it regulates heat and perspiration. In addition, the vest has an adjustable drawcord hem and zippered pockets for your hands, where you can safely store the essentials.