This lightweight innovative mask provides an excellent field of vision. It's versatility is suitable for either snorkeling or diving.  Comes with pre-made drop in RX lenses in powers -1.00 to -6.00 in 0.50 steps.  Coomes with plano (non prescription) tempered glass lenses.  Lenses are interchangeable for right and left lenses.  Lenses are sold per eye. Add one power per eye.  Clear lenses.  Premade goggle lenses that are close to your prescription, not exact. Mask will come unassembled. To have the goggle assembled add assembly to your order. 

To figure out the best drop in premade power lens for your prescription, see guide on "how to read a prescription" on the FAQ page.