Fuse Lenses for Spy Optic Helm (Ken Block) Plastic frame Plastic lens Polarized lenses Lens width: 56 millimeters Fuse Cascade Mirrored Polarized Lenses. Deep Orange Mirror Coating on a warm amber base cuts through bright light. Warm amber view. Amber tint gives true color perception. Cuts through blinding glare. Enhanced depth perception. Fuse Force extra dense scratch resistant hardcoating. Completely block harmful UV rays, providing 100% UV protection Fuse Force scratch resistant hard coating Lens Category 3, Ideal for Bright Light Custom Made to easily interchange with your current sunglasses.