The Speedo Seed Jr. Vanquisher Swim goggle use G.O. Fit System, inner eye fit design technology. Get a precision fit with the sleek, snug, low profile inner eye fit. Gasket rests snugly and securely in the eye socket. Excellent corrective lenses competitive and training goggle. Goggles provide a panoramic lens and has cushioned silicone seal. 4 nosepiece options for a custom fit. Goggles come equipped with anti-fog lens with UV protection. Anti-Fog prevents the condensation of water in the form of small droplets on a surface which resemble fog. The Jr. Your eyes need protection from more than just chlorine. Speedo’s UV protected lenses block the sun’s harmful UVA and UVB rays. Vanquisher Optical Goggles have durable polycarbonate lenses and, PVC and Latex free and are designed for youngsters or people with smaller faces. Diopters are available from -1.5 to -8.0 in 0.5 increments. The Speedo Jr. Vanquisher Goggles are designed for smaller and narrower faces.