Zoggs 315627 Predator Flex S/M - Polarized Swim Goggles 4 Flexpoint technology, frame flexes in 4 key areas Ultra Bronze Polarized Italian lenses protect your eyes and eliminate glare in open water swimming Curved lens technology provides expanded 180 degree vision Quick adjust by pulling the two straps to tighten and lift lever to loosen Lenses are coated with Fogbuster anti-fog clear vision