Spare/replacement lens for the the Aim sunglasses.With the spare lenses for the Aim sunglasses, it’s possible to change lenses for a lighter or darker tint, so you can use your sunglasses in a wider range of conditions.The Clarity road lens technology filters specific peaks in the color spectrum to enhance precision vision. Spare Lenses: Clarity MTB Brown / Light Silver Mirror CAT 2 VLT 34%,Clarity MTB Brown/Silver Mirror CAT 2 VLT 17%,Clarity MTB Brown CAT 1 VLT 46%,Clarity Road Violet CAT 2 VLT 27%,Clarity Road Violet/Gold mirror CAT 2 VLT 26%,Clarity Road Violet/Light Silver Mirror CAT 2 VLT 20%,Clarity Road Violet/Silver Mirror CAT 3 VLT 10%,Regular Performance Clear CAT 0 VLT 90%.