Molly has pannus asks needs them for times outside to block the U.V. rays. Since being diagnosed and on steady medication for her condition; I have to say these goggles are an integeral part of her care. Without Rex Specs care for fitment and functionality or mountain biking trips would not be apart of her daily life. We have used all tints and colors and have been impressed. Our only complaint is the lenses scratch easily in the bush. But at the cost of replacements versus not going out, we'll pay the cost