Fuse Lenses for Costa Del Mar Switchfoot Plastic frame Plastic lens Non-polarized lenses Lens width: 59 millimeters Fuse Glacier Mirrored Tinted Lenses. Bright Blue Metal Mirror Coating over a grey lens base with a warm grey view. Grey tint gives true color perception. Non-polarized lenses 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.