Spy+ Discord is perfect for those who want a little bit of everything. With SPY+'s revolutionary Happy lens technology, you can expect a boost in mood and alertness. The ARC polycarbonate lenses are tapered to follow the natural curvature of the eye and provide distortion-free vision. And with polarization, you can block out over 99% of surface glare. The Spy+ Discord is constructed from Grilamid, a lightweight frame material that is ideal for everyday wear due to its strength and flexibility. It also has robust 5-barrel hinges for added durability. 100% UV protection reduces eye fatigue and long-term sun damage. And if you ever need it, replacement lenses are available.