Spy Hielo Sunglasses - Grey Crystal Fade / Grey

What is Propionate? It's a soft, flexible material that allows for a sleek, dense finish creating a modern, comfortable, durable frame. For the Organic Chemists out there, it's C2H5COO−.

What is an 8-Base lens? A lens' Base refers to the amount of arc in the lens and therefore the arc in the frame. A 6-Base is a more flat, square shape creating a more scholarly look. A larger base like a 9-Base is more wrapped and therefore will appear more suited for active endeavors.

Any warranty? Yep. Spy provides a one year warranty from the date of purchase to replace any product or portion thereof which is deemed a manufacturer's defect.