This is a two-piece set of a mask and snorkel from Reef Tourer. It comes with removable prescription lenses for nearsightedness. Removing the prescription lenses makes it a mask without correction. The prescription is -5.0. It has been used 2-3 times, so I think the condition is good. The retail price was about 3500 yen. There is no case, so it will be shipped wrapped in bubble wrap. Thank you.