Designed for swimmers with a serious need for speed. The Speedo Vanquisher Optical Goggle features a rigid frame to create a watertight seal. The low profile keeps the goggle close to the face. Corrective lenses eliminate the need to wear contacts while swimming. Available in several strengths (diopters).Low profile performance optical goggle. Shatter resistant polycarbonate lens. UV protection. Anti-fog. Thin silcone gaskets for sleek, comfortable fit. Double silicone headstrap with back buckle.