VLT (or Visual Light Transmission) is how we measure how much light your goggle’s lens filters out on any given day. High VLT lenses are great for cloudy days when there isn’t much glare and your goggle needs are more concerned with wind and snow. Low VLT lenses are made to filter out more sun, and are more similar to a pair of sunglasses. There are lenses out there for every condition, some even automatically adjust for changes in the environment. To read more on VLT and to see our favorite goggles in every category, check out our buyer’s guide.