A soft-touch, jet-black chassis is paired with a precisely regulated polycarbonate UV filtering system. The non-polarized Polare lemon filter is an ultra-high contrast absorptive tint that allows 86 percent visible light transmission while blocking 100 percent of lightwaves up to 470 nm and all UVA/UVB rays. The filter is designed to absorb 40 percent of blue light and 70 percent HEV (High-Energy ultraviolet light) that can cause irritating eyestrain and fatigue. The smallest fitovers in the world are perfect for petite prescription frames and for children.