At Prois, performance fabric choices are EVERYTHING. We believe the cornerstone to the best outdoor gear lies in its fabrics. Our Callaid Down line shell is created with 100% polyester ripstop fabric with cire’ finish that provides excellent water resistance. 800 Gray Goose waterproof down. Deep hand pockets and chest pockets for easy accessibility. Vents constructed of breathable polyester/spandex for optimal ventilation. Prois believes Mother Nature got it right with down and the Callaid down line is a must-have core insulation piece!