In addition to the benefits related to Sodium Vapor lamps, the Venture II offers the maximum safeguard against eye injuries. The extraordinary 9.75 curved lenses provide more than 180 degrees of coverage, without the distraction of seams or traditional type side-shields. This almost frameless design creates a spectacle that weighs only 27 grams per pair. The Venture II also introduces our special "nose-buds" that secure the glass to your face without slipping, while providing a pillow soft fit.