Heron Glacier is purpose-built for demanding alpine environments where intense sunlight and reflected glare require serious eye protection. The vintage-inspired round frame is equipped with Category 4 shatterproof lenses and a full-mirror coating for extreme high-altitude conditions. Genuine leather side shields help block peripheral light, while the removable centerpiece allows the setup to adapt to your adventure. Lightweight yet highly durable, Heron Glacier is engineered for mountaineering, glacier travel, ski touring, and other high-alpine pursuits. Serious protection for serious elevation.