These are ultra-smart and tough ski and glacier sunglasses with fixed shells and featuring Spectron (X4) or Alti Spectron (X6) Polycarbonate Lenses, which are recommended for all sports because of their shock-resistant and lightweight qualites.
They are Cat. 3 (X4), transmitting 8-18% visible light, or Cat. 4 (X6), transmitting 3-8% visible light, and are suitable for bright light, mountain and water environments.
Features
Fixed shells: for optimal wrap and aeration
HCD Concept: high-wrap lens geometry for an extra-wide field of vision