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optical lenses from -1.0 to -8.0 diopters in -0.5 increments available for separate purchase.  Soft, flexible skirt conforms to a wide range of facial profiles.  Large silicone strap with swivel buckles offers a secure, custom fit.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eMask bag and instructions are included.\u003c\/p\u003e"}