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 380 nm instead of 420 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 lens has an anti-fog treatment - Shaped Grip Tech pads on the temples - Air Flow ventilation - Flexible nose pad - Removable side guards - Size M frame: - Lens Height (mm) : 43 - Bridge Distance (mm) : 17 - Temple Length (mm) : 120 - Base : 6 - Lens Size (mm) : 54 Julbo has been making sunglasses for more than 135 years. By buying Julbo, you are investing in a quality product and can rest assu