Oakley Enigma Mass 8191 Eyeglasses Size:55 This construction detail matters—spring hinges

This construction detail matters—spring hinges reduce stress on the frame and accommodate different head widths without constant adjustments

and hypoallergenic—safe even for children with sensitive skin

clean and store properly

The high bridge fit and integrated nose guards ensure comfortable all-day wear

The Steel Plate features Oakley's Three-Point Fit system

Oakley Enigma Mass 8191 Eyeglasses Size:55 This construction detail matters—spring hingesThe Oakley Enigma Mass 8191 eyeglasses combine athletic engineering with everyday wearability. This full rim square frame features a mixed material construction that balances durability with lightweight comfort. Built from Oakley's Performance Materials The front frame is constructed from O Matter, Oakley's proprietary stress resistant nylon that's 25% lighter than acetate and twice as strong. It flexes under pressure instead of snapping, resists