For the riders that wear glasses, it can be hard to find goggles that fit, and work without fogging your glasses under the goggles. Ive been looking for a solution (other then contacts\eye surgery\crossover full face helm). I came across these goggles from a friend that recommended me them, his friend wears glasses and has the same pair, and hasnt had a single problem with them. So I ordered them, being the cheaper fix to the problem, and these goggles do work! Has a micro fan above the front that draws air out the top, and fresh air threw the bottom, keeping your glasses from fogging. The motor has 2 speed settings. These goggles are made for eye glass wearers, so the inside face foam is slightly bigger, allowing even pretty large frame glasses to fit underneath them comfortably. The fan is powered by a single AAA battery, so there isnt much heft to them, and battery life is a estimated 50 hours. Overall, these have to be one of my better buys. I would highly recommend these to any eye glass wearers that havent found the right pair of goggles. They are a little on the pricey side, but you are buying a quality product with a lifetime defect warrantee.