Warm and responsibly made, the Buck Fleece Vest features warm polyester fleece to maintain our core temperature and Fjallraven's famous G-1000 fabric across the shoulders for added durability when we're wearing a backpack. Its PFC-free construction also features recycled materials and organic cotton to reduce waste, water usage, and pesticide use to help preserve our environment. This versatile vest works as mid-layer insulation under our shell and as an outer layer that helps us hold in our body heat on the trail or at the cabin.