Size:72-17-134mm

Front: TR

Temples: TR/TPR

Lock: TR (Patent)-Super easy lens-change system

Nose pads: L#Silicone(Patent)-Can be adjusted vertically and horizontally

Available for prescription RX

Lens: PC 8C 2.0mm or TAC 8C 1.0mm

Merits: Patent structure that very easy to change lens. Generally, customers will purchase 3 pairs of lenses as a set, different lenses are suitable for different weather.