Find great Casco nordic eyewear here! Find Casco eyewear that features a photochromic lens, which lightens or darkens with the changing light. Casco eyewear is a favorite among both biathletes and cross country skiers. These Nordic eyewear products serve as both sunglasses and visors. Enjoy a great day out on the trails while also protecting your eyes from the strong sun. Get your winter sports adventure started as soon as you shop Casco eyewear and Ski and Sports Shack!