Global Vision Freedom 24 Sunglasses with transforming 24-hour lenses have tint that automatically lightens as the sun goes down! These sunglasses are made with shatterproof polycarbonate lenses. UV400 filter provides maximum UV protection. Photochromatic transitional lenses make them great for day or night use. Scratch-resistant, anti-fog coating keeps your field of vision clear. Removable, vented EVA foam padding gives you style and comfort options.