Chock-full of heat-trapping down, the Flylow General's Down Sweater provides lightweight warmth and comfort on mid-winter ski tours, fall hikes, and chilly days around town. The 800-fill down is ultra-lofty and easily packable, making it the ideal piece to bring along on any adventure when things cool down; plus, it stows in its own pocket to take up less space in our pack. The Pertex Quantum material has a water-resistant treatment that repels light moisture during spring touring, and the breathable construction helps us stay cool while we're on the move.