These glasses are a part of the Julbo Ocean Master collection. Their glare protection is exceptional, and their UV protection reaches a wider spectrum of wave lengths than usual (all the way to 420 nm instead of 380 nm). Developed especially for use on water, their visible light transfer level is just 6%. The glasses are delivered with a floating strap, saving them if they end up in water. Due to the extreme glare protection, this model is not suitable for use in traffic. A great choice for sailing, paddling, fishing and ice fishing. - Cat4 lenses, 80% polarization - The inner surface of the lenses has an anti-fog treatment - Removable light shields - Lens height 43 mm - Lens distance 15 mm - Lever length 135 mm - Curvature 6 - Lens size 58 mm Julbo has been making sunglasses for more than 135 years. By buying Julbo, you are investing in a quality product and can rest assured the glasses offer perfect UV protection.