The Borealis is a long-sleeve semi-dry top constructed from our award-winning eXhaust 2.5 ultralight (UL) waterproof-breathable nylon. This top is designed to be light, breathable and offers users a full range-of-motion. The Borealis features our overlapping double tunnel and our new Stealth waist cinch system to work with your skirt and provide you with a dry seal and better paddling experience.