Details From high-speed arcs to the freedom of playing with gravity, S/MAX Sigma™ goggles deliver enhanced fit, vision, and instant lens changes to help you blow past your limits. Sigma™ lenses amplify contrast, enabling the eye to read terrain variations in all light conditions. Includes 2 Sigma™ lenses for bright sunny or snow and overcast conditions. SIGMA lenses improve definition to help you see terrain details better, especially in snowy or overcast light conditions. The shape of the frame has been adjusted to provide an even greater field of vision at the lower extremities, where you want it most. Anatomically refined fit comes from Salomon's Custom ID fit technology, which allows the soft part of the frame to match each individual's unique features.