This is the Ocean Reef Optical Lens Support for Aria Full Face Mask

Features:

• This frame is engineered with removable, snap in, legs.
• The frame can be installed in all OCEAN REEF FFSM and scuba masks (with the exception of XS size).
• This frame is a removable and customizable corrective lens option that no other FFSM offers.

Convenient optical correction that transforms in an inexpensive pair of glasses, when you're done snorkeling and scuba diving.