The Elevation series is the ultimate, lightweight, down insulating jacket for camp and the farthest reaches of the back country. It is filled with premium Canadian goose 700 fill water repellent down. The advanced Downtek water repellent down effectively eliminates all the negative attributes associated with down. A micro-thin nano polymer is applied to the down, creating a water repellent insulation that actually floats on water. Downtek repels water while maintaining its loft and insulation value, even in wet conditions.