style and performance. the sentry pro offers a sleek design with outstanding optical quality. whether you want to film new tricks or draw epic lines through the powder, the two sigmaâ„¢ lenses always ensure clear vision in different weather conditions. the special frame construction and salomon's custom id fit technology mean that the goggles immediately adapt to the shape of your face.sigmaâ„¢ sky blue lenssigmaâ„¢ lens enhances colour contrasts so you can see terrain details faster in all lighting conditions.