KUIU founder, Jason Hairston, has researched and sourced the best possible fabrics and materials. Some new, like technical stretch-woven and waterproof breathable fabrics from Toray, Japan's most innovative and technical fabric house, and some more traditional, like 100% Merino wool from New Zealand. Jason has worked closely on fit and building specs with the best factories in the world, and developed a patent pending carbon fiber backpack frame and harness system with a domestic technical design and development team. He's worn, tested, and refined the entire range, and worked with a small but noteworthy group of professional guides and hunters who have also field tested, in a full range of weather and environments.