We studied the human face to develop a special goggle that fits most face shapes. One Mirror avoids the areas around the eye that interfere with the seal, and the mirrored lenses reduce glare and brightness, making things easier when you swim in brightly lit pools or outdoors. Made for fitness and recreational swimming, this model prevents fogging thanks to its anti-fog lens treatment. Enjoy crystal-clear underwater vision through the wide polycarbonate lenses.