From our friends at Phunkshun Wear.
This is one of our standard pieces of equipment.
Their most versatile and most popular mask - customized for Quiver Killer. The Double Tube is designed to work on both cold and warm days, and excels during snow storms with its water repellant finish. No water penetrating the fabric means your mask will remain unfrozen and keep you out in the elements longer. Literally made from recycled water bottles down the road in Colorado.