• 360° Adjustable Temples : The ends of the temples can be moved in all directions. Under a helmet, over a hat or on the head, the frames are held in place.
• Grip Nose Pads : Nose pads with soft, non-slip insert for comfort and grip on the nose.
• Grip Tech Temples : Exclusive soft material on the temples that doesn't stick to hair, for perfect grip and comfort.
• Leather Side Shields : A special feature of glacier sunglasses, leather side shields have protected the eyes of generations of mountaineers and now create an unmistakably vintage look.
• Metal Frame : The iconic metal frame tested and approved by generations of mountaineers
• Removable Side Shields : Side protection from sunlight in extreme conditions.

Light Transmission

• Alti Arc 4 is a Cat. 4 mineral lens (visible light transmission rate: 7%). Superior optical quality and highly scratch and shock resistant. External anti-reflective coating to improve visual comfort by eliminating stray reflections. And flash finish: improves filtration of visible light by applying a mirror effect to the lens. Recommended for high-mountain environments and expeditions.
• Spectron 3 (cat. 3 - visible light transmission rate: 13%) is a polycarbonate lens. This lens provides versatility in sport and everyday life. Suitable for multi-activity and daily life.
• Spectron 4 (cat. 4 - visible light transmission rate: 5%) is a polycarbonate lens with internal anit-fog technology and anti-reflective coating. This lens offers protection against blinding sunlight, and is perfect for protecting young eyes. Suitable for high-sunlight environments and children’s eyewear.