The Mountain Hardwear Men’s Mt. Eyak Down Vest is an insulated vest for town and travel. Built for your off days, when you still have to hustle around the city and get things done. The 600 fill power down is RDS-certified and incredibly lightweight. Pack it down into your luggage and pull it out when you’ve reached your destination. Over a long sleeve and under a shell, this versatile warmer will keep you heated.