Fuse Lenses for Costa Del Mar Howler Plastic frame Plastic lens Polarized lenses Lens width: 63 millimeters Fuse +Plus Premium Midnight Mirrored Polarized Lenses. Subtle Dark Blue Metal Mirror Coating over a grey lens base. Grey view. Grey tint gives true color perception. Cuts through blinding glare. Superior optical clarity. Enhanced depth perception. Clear Guard Hydroleophobic barrier. Features a 'Fuse +Plus' laser engraving in the left lens. Completely block harmful UV rays, providing 100% UV protection Up to 3 times more scratch resistant hard coating than standard lenses Lens Category 3, Ideal for Bright Light Custom Made to easily interchange with your current sunglasses.