eagle optical swim goggles 'Triathlon (Swimming Goggles)'] leak free seal and a groundbreaking Swimming GogglesJunior (Swimming Goggles)['Learn to Swim (Swimming Goggles)' leak free seal and a groundbreaking ultra light frameless design thanks to our Cool Inject Technology for reduced drag in the water offering panoramic vision both laterally and vertically Utilizing a unique construction of a one piece silicone skirt and nose bridge frame combined with interchangeable lens retainer allows swimmers to purchase right and left high grade optical lenses to meet their specific vision Eagle swim goggles come with polycarbonate interchangeable diopter lenses (half step increments from 1